perf: Optimize FrankenPHP/Octane configuration for high load

**Changes:**

1. **Caddyfile**:
   - Reduced num_threads from 24 to 20
   - Added request timeouts (read_body: 10s, write: 60s, idle: 120s)
   - With 4 containers: 20 × 4 = 80 total workers

2. **Dockerfile**:
   - Added explicit --workers=20 to octane:frankenphp command
   - Increased --max-requests from 250 to 1000
   - Applied to app-dev, app-release, and app stages

3. **Octane config**:
   - Enabled DisconnectFromDatabases listener
   - Enabled CollectGarbage listener
   - Prevents DB connection leaks and memory leaks

**Impact:**
- Better resource management under load
- Prevents connection pool exhaustion
- Requires db.t3.large (591 max connections) or better
- Supports up to 250 concurrent VUs

**Related:**
- Requires RDS upgrade from db.t4g.micro to db.t3.large
- Works with DB_CONNECTION_POOL_SIZE=25 (100 total connections)
- See configuration-analysis.md for details

Caddyfile

@@ -1,6 +1,9 @@
 {
 	frankenphp {
-		num_threads 24
+		# Reduced from 24 to 20 for better resource management
+		# With 4 containers: 20 × 4 = 80 total workers
+		# Requires db.t3.large (591 max connections) or better
+		num_threads 20
 	}
 	order php_server before file_server
 }
@@ -8,6 +11,15 @@
 http://:8000 {
 	root * /fleetbase/api/public
 	encode zstd br gzip
+	
+	# Request timeouts to prevent hanging
+	timeouts {
+		read_body 10s
+		read_header 5s
+		write 60s
+		idle 120s
+	}
+	
 	php_server {
 		resolve_root_symlink
 	}

api/config/octane.php

@@ -105,8 +105,8 @@ return [
         OperationTerminated::class => [
             FlushOnce::class,
             FlushTemporaryContainerInstances::class,
-            // DisconnectFromDatabases::class,
-            // CollectGarbage::class,
+            DisconnectFromDatabases::class,  // ✅ Release DB connections after each request
+            CollectGarbage::class,           // ✅ Prevent memory leaks
         ],
 
         WorkerErrorOccurred::class => [

docker/Dockerfile

@@ -158,14 +158,14 @@ CMD ["php", "artisan", "queue:work"]
 # Application dev stage
 FROM base AS app-dev
 ENTRYPOINT ["docker-php-entrypoint"]
-CMD ["sh", "-c", "php artisan octane:frankenphp --max-requests=250 --port=8000 --host=0.0.0.0 --watch"]
+CMD ["sh", "-c", "php artisan octane:frankenphp --workers=20 --max-requests=1000 --port=8000 --host=0.0.0.0 --watch"]
 
 # Application release stage
 FROM base AS app-release
 ENTRYPOINT ["docker-php-entrypoint"]
-CMD ["sh", "-c", "php artisan octane:frankenphp --max-requests=250 --port=8000 --host=0.0.0.0"] 
+CMD ["sh", "-c", "php artisan octane:frankenphp --workers=20 --max-requests=1000 --port=8000 --host=0.0.0.0"] 
 
 # Application stage
 FROM base AS app
 ENTRYPOINT ["/sbin/ssm-parent", "-c", ".ssm-parent.yaml", "run", "--", "docker-php-entrypoint"]
-CMD ["sh", "-c", "php artisan octane:frankenphp --max-requests=250 --port=8000 --host=0.0.0.0"]
+CMD ["sh", "-c", "php artisan octane:frankenphp --workers=20 --max-requests=1000 --port=8000 --host=0.0.0.0"]