debug(backend): add port binding logs and memory usage instrumentation

backend/app.py

@@ -54,6 +54,15 @@ import asyncio
 from datetime import datetime
 from loguru import logger
 
+def _log_memory_usage():
+    try:
+        import psutil
+        mem_mb = psutil.Process().memory_info().rss // (1024 * 1024)
+        logger.info(f"Memory usage (MB): {mem_mb}")
+    except Exception:
+        # psutil not available or failed; skip silently
+        pass
+
 
 # Import modular utilities (skip OnboardingManager import in podcast-only mode)
 from alwrity_utils import HealthChecker, RateLimiter, FrontendServing, RouterManager
@@ -579,6 +588,7 @@ async def serve_frontend():
 async def startup_event():
     """Initialize services on startup."""
     try:
+        _log_memory_usage()
         # Skip startup health checks in podcast-only mode to avoid unnecessary DB errors
         if not is_podcast_only_demo_mode():
             startup_report = run_startup_health_routine(app)

backend/start_alwrity_backend.py

@@ -315,6 +315,7 @@ def start_backend(enable_reload=False, production_mode=False):
     host = os.getenv("HOST", "0.0.0.0")
     port = int(os.getenv("PORT", "8000"))
     reload = os.environ.get("RELOAD", "false").lower() == "true"
+    print(f"[DEBUG] Bind prepared - host={host}, port={port}, reload={reload}", flush=True)
     
     print(f"   📍 Host: {host}", flush=True)
     print(f"   🔌 Port: {port}", flush=True)
@@ -370,6 +371,7 @@ def start_backend(enable_reload=False, production_mode=False):
             print(f"[ERROR] Video stack preflight failed: {_video_stack_err}")
             return False
         
+        print(f"[DEBUG] Starting uvicorn with host={host} port={port}", flush=True)
         uvicorn.run(
             "app:app",
             host=host,