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.

src/Framework/Security/CsrfTokenGenerator.php

@@ -10,8 +10,7 @@ final readonly class CsrfTokenGenerator
 {
     public function __construct(
         private RandomGenerator $random
-    ) {
-    }
+    ) {}
 
     /**
      * Generate a new CSRF token.
@@ -20,7 +19,7 @@ final readonly class CsrfTokenGenerator
      */
     public function generate(): CsrfToken
     {
-        $tokenValue = bin2hex($this->random->bytes(32));
+        $tokenValue = $this->random->hex(32);
 
         return CsrfToken::fromString($tokenValue);
     }

src/Framework/Security/RequestSigning/Migrations/CreateSigningKeysTable.php

@@ -7,33 +7,40 @@ namespace App\Framework\Security\RequestSigning\Migrations;
 use App\Framework\Database\ConnectionInterface;
 use App\Framework\Database\Migration\Migration;
 use App\Framework\Database\Migration\MigrationVersion;
+use App\Framework\Database\Schema\Blueprint;
+use App\Framework\Database\Schema\Schema;
 
 final class CreateSigningKeysTable implements Migration
 {
     public function up(ConnectionInterface $connection): void
     {
-        $sql = <<<SQL
-            CREATE TABLE IF NOT EXISTS signing_keys (
-                key_id          VARCHAR(255) NOT NULL,
-                key_material    TEXT NOT NULL,
-                algorithm       VARCHAR(50) NOT NULL,
-                expires_at      TIMESTAMP NULL DEFAULT NULL,
-                is_active       BOOLEAN NOT NULL DEFAULT TRUE,
-                created_at      TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
-                updated_at      TIMESTAMP NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
+        $schema = new Schema($connection);
 
-                PRIMARY KEY (key_id),
-                INDEX idx_signing_keys_active_expires (is_active, expires_at),
-                INDEX idx_signing_keys_created (created_at)
-            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
-SQL;
+        $schema->createIfNotExists('signing_keys', function (Blueprint $table) {
+            $table->string('key_id', 255)->primary();
+            $table->text('key_material');
+            $table->string('algorithm', 50);
+            $table->timestamp('expires_at')->nullable();
+            $table->boolean('is_active')->default(true);
+            $table->timestamp('created_at')->useCurrent();
+            $table->timestamp('updated_at')->nullable();
 
-        $connection->query($sql);
+            $table->index(['is_active', 'expires_at'], 'idx_signing_keys_active_expires');
+            $table->index('created_at', 'idx_signing_keys_created');
+
+            $table->engine('InnoDB');
+            $table->charset('utf8mb4');
+            $table->collation('utf8mb4_unicode_ci');
+        });
+
+        $schema->execute();
     }
 
     public function down(ConnectionInterface $connection): void
     {
-        $connection->execute("DROP TABLE IF EXISTS signing_keys");
+        $schema = new Schema($connection);
+        $schema->dropIfExists('signing_keys');
+        $schema->execute();
     }
 
     public function getVersion(): MigrationVersion

src/Framework/Security/RequestSigning/SigningString.php

@@ -13,8 +13,7 @@ final readonly class SigningString
 {
     public function __construct(
         private Request $request,
-    ) {
-    }
+    ) {}
 
     /**
      * Build the signing string from specified headers