feat(Production): Complete production deployment infrastructure

- Add comprehensive health check system with multiple endpoints
- Add Prometheus metrics endpoint
- Add production logging configurations (5 strategies)
- Add complete deployment documentation suite:
  * QUICKSTART.md - 30-minute deployment guide
  * DEPLOYMENT_CHECKLIST.md - Printable verification checklist
  * DEPLOYMENT_WORKFLOW.md - Complete deployment lifecycle
  * PRODUCTION_DEPLOYMENT.md - Comprehensive technical reference
  * production-logging.md - Logging configuration guide
  * ANSIBLE_DEPLOYMENT.md - Infrastructure as Code automation
  * README.md - Navigation hub
  * DEPLOYMENT_SUMMARY.md - Executive summary
- Add deployment scripts and automation
- Add DEPLOYMENT_PLAN.md - Concrete plan for immediate deployment
- Update README with production-ready features

All production infrastructure is now complete and ready for deployment.

docker/postgres/init/01-extensions.sql

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+-- PostgreSQL Extensions for Custom PHP Framework
+-- Auto-loaded during database initialization
+
+-- UUID Support
+CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
+
+-- Performance Monitoring
+CREATE EXTENSION IF NOT EXISTS "pg_stat_statements";
+
+-- Full-Text Search (German + English)
+CREATE EXTENSION IF NOT EXISTS "unaccent";
+
+-- Fuzzy String Matching (for search features)
+CREATE EXTENSION IF NOT EXISTS "pg_trgm";
+
+-- Case-insensitive text type
+CREATE EXTENSION IF NOT EXISTS "citext";
+
+-- JSON Functions (additional to built-in JSONB)
+-- Uncomment if needed:
+-- CREATE EXTENSION IF NOT EXISTS "jsonb_plperl";
+
+-- Cryptographic functions
+CREATE EXTENSION IF NOT EXISTS "pgcrypto";
+
+-- Framework-specific Schema
+CREATE SCHEMA IF NOT EXISTS framework;
+
+COMMENT ON SCHEMA framework IS 'Custom PHP Framework internal tables and functions';
+
+-- Grant permissions
+GRANT USAGE ON SCHEMA framework TO PUBLIC;
+-- GRANT CREATE ON SCHEMA framework TO postgres;  -- Will be set via environment

docker/postgres/postgresql.conf

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+# PostgreSQL Configuration for Custom PHP Framework
+# Optimized for development with production-ready defaults
+
+# ==========================================
+# Connection Settings
+# ==========================================
+listen_addresses = '*'
+max_connections = 100
+superuser_reserved_connections = 3
+
+# ==========================================
+# Memory Settings
+# ==========================================
+# Adjust based on available RAM (docker-compose limits: 1GB)
+shared_buffers = 256MB
+effective_cache_size = 768MB
+maintenance_work_mem = 64MB
+work_mem = 4MB
+
+# ==========================================
+# Query Tuning
+# ==========================================
+random_page_cost = 1.1  # Optimized for SSD
+effective_io_concurrency = 200
+
+# ==========================================
+# Write-Ahead Log (WAL)
+# ==========================================
+wal_buffers = 16MB
+min_wal_size = 1GB
+max_wal_size = 4GB
+checkpoint_completion_target = 0.9
+
+# ==========================================
+# Logging
+# ==========================================
+logging_collector = on
+log_directory = 'pg_log'
+log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log'
+log_min_duration_statement = 200  # Log slow queries (>200ms)
+log_line_prefix = '%t [%p]: [%l-1] user=%u,db=%d,app=%a,client=%h '
+log_checkpoints = on
+log_connections = on
+log_disconnections = on
+log_lock_waits = on
+log_temp_files = 0
+log_autovacuum_min_duration = 0
+
+# ==========================================
+# Performance Monitoring
+# ==========================================
+shared_preload_libraries = 'pg_stat_statements'
+pg_stat_statements.track = all
+pg_stat_statements.max = 10000
+
+# ==========================================
+# Autovacuum
+# ==========================================
+autovacuum = on
+autovacuum_max_workers = 3
+autovacuum_naptime = 1min
+
+# ==========================================
+# Locale & Formatting
+# ==========================================
+timezone = 'UTC'
+lc_messages = 'C'
+lc_monetary = 'C'
+lc_numeric = 'C'
+lc_time = 'C'
+default_text_search_config = 'pg_catalog.english'
+
+# ==========================================
+# Connection Pooling (Framework-friendly)
+# ==========================================
+# Connection lifecycle matching framework patterns
+tcp_keepalives_idle = 60
+tcp_keepalives_interval = 10
+tcp_keepalives_count = 5
+
+# ==========================================
+# Security (Development Defaults)
+# ==========================================
+# In production, use SSL and stricter settings
+ssl = off
+password_encryption = scram-sha-256

docker/postgres/postgresql.production.conf

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+# PostgreSQL Production Configuration
+# Custom PHP Framework - Production Optimized Settings
+# PostgreSQL 16
+
+# ============================================================================
+# CONNECTIONS AND AUTHENTICATION
+# ============================================================================
+
+# Maximum number of concurrent connections
+max_connections = 100
+
+# Reserved connections for superuser emergency access
+superuser_reserved_connections = 3
+
+# ============================================================================
+# MEMORY CONFIGURATION
+# ============================================================================
+
+# Shared memory for cache (25% of RAM, adjust based on available memory)
+# For 4GB RAM server: 1GB
+# For 8GB RAM server: 2GB
+# For 16GB RAM server: 4GB
+shared_buffers = 2GB
+
+# Memory for complex sorts (per operation)
+work_mem = 16MB
+
+# Memory for maintenance operations (VACUUM, CREATE INDEX)
+maintenance_work_mem = 256MB
+
+# Maximum memory for autovacuum workers
+autovacuum_work_mem = 128MB
+
+# Effective cache size (hint for query planner, 50-75% of RAM)
+effective_cache_size = 6GB
+
+# ============================================================================
+# WRITE-AHEAD LOG (WAL)
+# ============================================================================
+
+# WAL level for replication and point-in-time recovery
+wal_level = replica
+
+# Minimum size of past WAL files
+min_wal_size = 1GB
+
+# Maximum size of WAL files
+max_wal_size = 4GB
+
+# Number of WAL sender processes (for replication)
+max_wal_senders = 3
+
+# Number of replication slots
+max_replication_slots = 3
+
+# WAL keep size (for replication lag)
+wal_keep_size = 1GB
+
+# Synchronous commit (trade-off between durability and performance)
+# on: Full durability (safest, slower)
+# remote_apply: Wait for replica to apply (if using streaming replication)
+# local: Wait for local flush (balanced)
+# off: Fastest but risk of data loss on crash (NOT recommended for production)
+synchronous_commit = on
+
+# Checkpoint frequency (time between checkpoints)
+checkpoint_timeout = 15min
+
+# Target checkpoint completion time (fraction of checkpoint_timeout)
+checkpoint_completion_target = 0.9
+
+# ============================================================================
+# QUERY PLANNING
+# ============================================================================
+
+# Random page cost (lower for SSD, higher for HDD)
+# SSD: 1.0-1.1, HDD: 4.0
+random_page_cost = 1.1
+
+# Sequential page cost
+seq_page_cost = 1.0
+
+# Effective I/O concurrency (number of concurrent disk I/O operations)
+# SSD: 200, HDD: 2-4
+effective_io_concurrency = 200
+
+# ============================================================================
+# PARALLELISM
+# ============================================================================
+
+# Maximum number of parallel workers per query
+max_parallel_workers_per_gather = 2
+
+# Maximum number of parallel maintenance workers
+max_parallel_maintenance_workers = 2
+
+# Maximum number of parallel workers (total across all sessions)
+max_parallel_workers = 4
+
+# ============================================================================
+# LOGGING
+# ============================================================================
+
+# Log destination
+log_destination = 'stderr'
+
+# Logging collector (rotate logs automatically)
+logging_collector = on
+
+# Log directory
+log_directory = 'log'
+
+# Log filename pattern (include date for rotation)
+log_filename = 'postgresql-%Y-%m-%d.log'
+
+# Log rotation age (daily)
+log_rotation_age = 1d
+
+# Log rotation size (500MB per file)
+log_rotation_size = 500MB
+
+# Truncate logs on rotation
+log_truncate_on_rotation = on
+
+# Log line prefix (include timestamp, user, database, PID)
+log_line_prefix = '%t [%p] %u@%d '
+
+# Log connections
+log_connections = on
+
+# Log disconnections
+log_disconnections = on
+
+# Log duration of statements (in milliseconds)
+# Log only slow queries (>500ms)
+log_min_duration_statement = 500
+
+# Log lock waits (statements waiting for locks)
+log_lock_waits = on
+
+# Log checkpoints
+log_checkpoints = on
+
+# Log autovacuum activity
+log_autovacuum_min_duration = 0
+
+# ============================================================================
+# AUTOVACUUM
+# ============================================================================
+
+# Enable autovacuum
+autovacuum = on
+
+# Maximum number of autovacuum workers
+autovacuum_max_workers = 3
+
+# Naptime between autovacuum runs
+autovacuum_naptime = 1min
+
+# Minimum number of updated/deleted tuples before vacuum
+autovacuum_vacuum_threshold = 50
+
+# Minimum number of inserted tuples before analyze
+autovacuum_analyze_threshold = 50
+
+# Fraction of table size to add to vacuum threshold
+autovacuum_vacuum_scale_factor = 0.1
+
+# Fraction of table size to add to analyze threshold
+autovacuum_analyze_scale_factor = 0.05
+
+# Cost delay for autovacuum (throttling)
+autovacuum_vacuum_cost_delay = 10ms
+
+# Cost limit for autovacuum
+autovacuum_vacuum_cost_limit = 200
+
+# ============================================================================
+# STATISTICS
+# ============================================================================
+
+# Track activity across all databases
+track_activities = on
+
+# Track counts of rows accessed
+track_counts = on
+
+# Track I/O timing
+track_io_timing = on
+
+# Track functions
+track_functions = all
+
+# ============================================================================
+# CONNECTION POOLING SUPPORT
+# ============================================================================
+
+# Prepared statements (use with PgBouncer in transaction pooling mode)
+# For PgBouncer: set to 'auto' or create prepared statements per transaction
+# For direct connections: 'on' for better performance
+# plan_cache_mode = auto
+
+# ============================================================================
+# STATEMENT TIMEOUT
+# ============================================================================
+
+# Maximum statement execution time (30 seconds)
+# Prevents long-running queries from blocking
+statement_timeout = 30s
+
+# Lock timeout (10 seconds)
+# Prevents long lock waits
+lock_timeout = 10s
+
+# Idle in transaction session timeout (5 minutes)
+# Closes idle transactions automatically
+idle_in_transaction_session_timeout = 5min
+
+# ============================================================================
+# SECURITY
+# ============================================================================
+
+# SSL configuration (if using SSL)
+# ssl = on
+# ssl_cert_file = '/path/to/server.crt'
+# ssl_key_file = '/path/to/server.key'
+# ssl_ca_file = '/path/to/ca.crt'
+
+# Password encryption (scram-sha-256 is most secure)
+password_encryption = scram-sha-256
+
+# ============================================================================
+# CLIENT CONNECTION DEFAULTS
+# ============================================================================
+
+# Default transaction isolation level
+default_transaction_isolation = 'read committed'
+
+# Timezone
+timezone = 'UTC'
+
+# Client encoding
+client_encoding = 'UTF8'
+
+# Locale settings
+lc_messages = 'en_US.UTF-8'
+lc_monetary = 'en_US.UTF-8'
+lc_numeric = 'en_US.UTF-8'
+lc_time = 'en_US.UTF-8'
+
+# Default text search configuration
+default_text_search_config = 'pg_catalog.english'
+
+# ============================================================================
+# PERFORMANCE TUNING NOTES
+# ============================================================================
+
+# These settings are optimized for:
+# - 8GB RAM server
+# - SSD storage
+# - Mixed OLTP/OLAP workload
+# - Connection pooling via PgBouncer (optional)
+
+# Adjust based on your hardware:
+#
+# For 4GB RAM server:
+#   shared_buffers = 1GB
+#   effective_cache_size = 3GB
+#   work_mem = 8MB
+#
+# For 16GB RAM server:
+#   shared_buffers = 4GB
+#   effective_cache_size = 12GB
+#   work_mem = 32MB
+#
+# For HDD storage:
+#   random_page_cost = 4.0
+#   effective_io_concurrency = 2
+
+# ============================================================================
+# MONITORING QUERIES
+# ============================================================================
+
+# Check current connections:
+# SELECT count(*) FROM pg_stat_activity;
+
+# Check slow queries:
+# SELECT pid, query, now() - query_start AS duration
+# FROM pg_stat_activity
+# WHERE state = 'active' AND now() - query_start > interval '5 seconds';
+
+# Check database size:
+# SELECT pg_database.datname, pg_size_pretty(pg_database_size(pg_database.datname))
+# FROM pg_database ORDER BY pg_database_size(pg_database.datname) DESC;
+
+# Check table bloat (vacuum needed):
+# SELECT schemaname, tablename,
+#        pg_size_pretty(pg_total_relation_size(schemaname||'.'||tablename)) AS size
+# FROM pg_tables WHERE schemaname = 'public' ORDER BY pg_total_relation_size(schemaname||'.'||tablename) DESC;
+
+# Check index usage:
+# SELECT schemaname, tablename, indexname, idx_scan, idx_tup_read, idx_tup_fetch
+# FROM pg_stat_user_indexes ORDER BY idx_scan ASC;