fix: explicitly disable StarletteIntegration via disabled_integrations

Sentry auto-enables StarletteIntegration by default even when not in
the integrations list. Use disabled_integrations parameter to explicitly
prevent it from loading and patching the middleware stack.

backend/monitoring/sentry.py

@@ -24,14 +24,14 @@ from contextlib import suppress
 try:
     import sentry_sdk
     from sentry_sdk.integrations.fastapi import FastApiIntegration
+    from sentry_sdk.integrations.starlette import StarletteIntegration
     from sentry_sdk.integrations.logging import LoggingIntegration
     from sentry_sdk.integrations.asyncio import AsyncioIntegration
-    # NOTE: StarletteIntegration intentionally not imported - causes ASGI conflicts
-    # with Gradio's internal BaseHTTPMiddleware
     SENTRY_AVAILABLE = True
 except ImportError:
     SENTRY_AVAILABLE = False
     sentry_sdk = None
+    StarletteIntegration = None
 
 logger = logging.getLogger(__name__)
 
@@ -335,6 +335,10 @@ def initialise_sentry() -> bool:
             # Integrations
             integrations=integrations,
 
+            # Explicitly disable StarletteIntegration - it patches middleware stack
+            # which conflicts with Gradio's internal BaseHTTPMiddleware
+            disabled_integrations=[StarletteIntegration],
+
             # Additional options
             debug=os.getenv("SENTRY_DEBUG", "false").lower() == "true",
         )