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/DI/DefaultContainer.php

@@ -24,7 +24,9 @@ final class DefaultContainer implements Container
     private readonly LazyInstantiator $lazyInstantiator;
 
     public readonly MethodInvoker $invoker;
+
     public readonly ContainerIntrospector $introspector;
+
     public readonly FrameworkMetricsCollector $metrics;
 
     public function __construct(
@@ -44,7 +46,7 @@ final class DefaultContainer implements Container
             $this->instances,
             $this->bindings,
             $this->reflectionProvider,
-            fn(): array => $this->resolving
+            fn (): array => $this->resolving
         );
         $this->metrics = new FrameworkMetricsCollector();
 
@@ -55,7 +57,11 @@ final class DefaultContainer implements Container
     public function bind(string $abstract, callable|string|object $concrete): void
     {
         $this->bindings->bind($abstract, $concrete);
-        $this->clearCaches(ClassName::create($abstract));
+
+        // Only clear caches for valid class names, skip string keys like 'filesystem.storage.local'
+        if (class_exists($abstract) || interface_exists($abstract)) {
+            $this->clearCaches(ClassName::create($abstract));
+        }
     }
 
     public function singleton(string $abstract, callable|string|object $concrete): void
@@ -121,7 +127,9 @@ final class DefaultContainer implements Container
         try {
             $instance = $this->buildInstance($class);
 
-            if ($this->singletonDetector->isSingleton(ClassName::create($class))) {
+            // Only check singleton attribute for actual classes
+            if ((class_exists($class) || interface_exists($class)) &&
+                $this->singletonDetector->isSingleton(ClassName::create($class))) {
                 $this->instances->setSingleton($class, $instance);
             } else {
                 $this->instances->setInstance($class, $instance);
@@ -131,6 +139,7 @@ final class DefaultContainer implements Container
         } catch (Throwable $e) {
             // Track resolution failures
             $this->metrics->increment('container.resolve.failures');
+
             throw $e;
         } finally {
             array_pop($this->resolving);
@@ -139,11 +148,20 @@ final class DefaultContainer implements Container
 
     private function buildInstance(string $class): object
     {
-        $className = ClassName::create($class);
         if ($this->bindings->hasBinding($class)) {
             return $this->resolveBinding($class, $this->bindings->getBinding($class));
         }
 
+        // For string keys without bindings, throw immediately
+        if (!class_exists($class) && !interface_exists($class)) {
+            throw new \RuntimeException(
+                "Cannot resolve '{$class}': not a valid class and no binding exists. " .
+                "Available bindings: " . implode(', ', array_keys($this->bindings->getAllBindings()))
+            );
+        }
+
+        $className = ClassName::create($class);
+
         // Enhanced diagnostics for missing bindings
         try {
             $reflection = $this->reflectionProvider->getClass($className);