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.

tests/Feature/Framework/Process/ProcessIntegrationTest.php

@@ -0,0 +1,215 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Framework\Console\ExitCode;
+use App\Framework\Filesystem\ValueObjects\FilePath;
+use App\Framework\Logging\Logger;
+use App\Framework\Process\SystemProcess;
+use App\Framework\Process\ValueObjects\Command;
+use App\Framework\Process\ValueObjects\EnvironmentVariables;
+
+beforeEach(function () {
+    $this->logger = Mockery::mock(Logger::class);
+    $this->logger->shouldReceive('debug')->andReturn(null);
+
+    $this->process = new SystemProcess($this->logger);
+});
+
+afterEach(function () {
+    Mockery::close();
+});
+
+describe('Process Integration - Real World Scenarios', function () {
+    it('can execute multi-line script', function () {
+        $command = Command::fromString('
+            echo "line1"
+            echo "line2"
+            echo "line3"
+        ');
+
+        $result = $this->process->run($command);
+
+        expect($result->isSuccess())->toBeTrue()
+            ->and($result->stdout)->toContain('line1')
+            ->and($result->stdout)->toContain('line2')
+            ->and($result->stdout)->toContain('line3');
+    });
+
+    it('can create and read temporary file', function () {
+        $tempFile = FilePath::temp('process_test.txt');
+        $command = Command::fromString(
+            "echo 'test content' > {$tempFile->toString()} && cat {$tempFile->toString()}"
+        );
+
+        $result = $this->process->run($command);
+
+        expect($result->isSuccess())->toBeTrue()
+            ->and($result->stdout)->toContain('test content');
+
+        // Cleanup
+        if ($tempFile->exists()) {
+            unlink($tempFile->toString());
+        }
+    });
+
+    it('can pipe commands', function () {
+        $command = Command::fromString('echo "hello world" | grep "world"');
+
+        $result = $this->process->run($command);
+
+        expect($result->isSuccess())->toBeTrue()
+            ->and($result->stdout)->toContain('world');
+    });
+
+    it('handles complex environment variable substitution', function () {
+        $env = EnvironmentVariables::fromArray([
+            'PREFIX' => 'test',
+            'SUFFIX' => 'value',
+        ]);
+
+        $command = Command::fromString('echo "$PREFIX-$SUFFIX"');
+
+        $result = $this->process->run(
+            command: $command,
+            env: $env
+        );
+
+        expect($result->stdout)->toContain('test-value');
+    });
+
+    it('can execute PHP script', function () {
+        $phpCode = 'echo json_encode(["status" => "ok", "pid" => getmypid()]);';
+        $command = Command::fromArray(['php', '-r', $phpCode]);
+
+        $result = $this->process->run($command);
+
+        expect($result->isSuccess())->toBeTrue();
+
+        $output = json_decode($result->stdout, true);
+        expect($output)->toBeArray()
+            ->and($output['status'])->toBe('ok')
+            ->and($output['pid'])->toBeGreaterThan(0);
+    });
+
+    it('handles large output', function () {
+        // Generate 1000 lines of output
+        $command = Command::fromString('for i in {1..1000}; do echo "Line $i"; done');
+
+        $result = $this->process->run($command);
+
+        expect($result->isSuccess())->toBeTrue();
+
+        $lines = explode("\n", trim($result->stdout));
+        expect(count($lines))->toBeGreaterThanOrEqual(1000);
+    });
+
+    it('preserves exit codes correctly', function () {
+        $testCases = [
+            ['exit 0', ExitCode::SUCCESS],
+            ['exit 1', ExitCode::GENERAL_ERROR],
+            ['exit 2', ExitCode::USAGE_ERROR],
+            ['exit 126', ExitCode::PERMISSION_DENIED],
+        ];
+
+        foreach ($testCases as [$cmd, $expectedCode]) {
+            $result = $this->process->run(Command::fromString($cmd));
+            expect($result->exitCode)->toBe($expectedCode);
+        }
+    });
+});
+
+describe('Process Integration - Error Handling', function () {
+    it('handles command not found', function () {
+        $result = $this->process->run(
+            Command::fromString('nonexistent_command_xyz_123')
+        );
+
+        expect($result->isFailed())->toBeTrue()
+            ->and($result->hasErrors())->toBeTrue();
+    });
+
+    it('handles permission denied', function () {
+        // Try to write to root directory (should fail)
+        $command = Command::fromString('touch /root/test_file.txt');
+
+        $result = $this->process->run($command);
+
+        expect($result->isFailed())->toBeTrue();
+    });
+
+    it('handles syntax errors in shell commands', function () {
+        $command = Command::fromString('echo "unclosed string');
+
+        $result = $this->process->run($command);
+
+        expect($result->isFailed())->toBeTrue();
+    });
+});
+
+describe('Process Integration - Performance', function () {
+    it('can execute multiple processes sequentially', function () {
+        $startTime = microtime(true);
+
+        for ($i = 0; $i < 5; $i++) {
+            $result = $this->process->run(
+                Command::fromArray(['echo', "iteration {$i}"])
+            );
+
+            expect($result->isSuccess())->toBeTrue();
+        }
+
+        $totalTime = microtime(true) - $startTime;
+
+        // Should complete 5 simple commands in under 2 seconds
+        expect($totalTime)->toBeLessThan(2.0);
+    });
+
+    it('tracks runtime accurately', function () {
+        $sleepTime = 0.2; // 200ms
+        $result = $this->process->run(
+            Command::fromArray(['sleep', (string) $sleepTime])
+        );
+
+        $runtime = $result->runtime->toSeconds();
+
+        // Runtime should be approximately the sleep time (with some tolerance)
+        expect($runtime)->toBeGreaterThanOrEqual($sleepTime)
+            ->and($runtime)->toBeLessThan($sleepTime + 0.1);
+    });
+});
+
+describe('Process Integration - Async Process Management', function () {
+    it('can manage multiple async processes', function () {
+        $processes = [];
+
+        // Start 3 processes
+        for ($i = 0; $i < 3; $i++) {
+            $processes[] = $this->process->start(
+                Command::fromArray(['sleep', '0.1'])
+            );
+        }
+
+        // All should be running
+        foreach ($processes as $proc) {
+            expect($proc->isRunning())->toBeTrue();
+        }
+
+        // Wait for all
+        foreach ($processes as $proc) {
+            $result = $proc->wait();
+            expect($result->isSuccess())->toBeTrue();
+        }
+    });
+
+    it('can capture output from async process', function () {
+        $running = $this->process->start(
+            Command::fromArray(['echo', 'async output'])
+        );
+
+        $result = $running->wait();
+
+        expect($result->stdout)->toContain('async output')
+            ->and($result->isSuccess())->toBeTrue();
+    });
+});