feat: Implement TTS Streaming Latency Analysis and Optimization Plan

.vscode/settings.json

@@ -6,5 +6,6 @@
     "python.testing.pytestEnabled": true,
     "python-envs.defaultEnvManager": "ms-python.python:venv",
     "python-envs.defaultPackageManager": "ms-python.python:pip",
-    "python-envs.pythonProjects": []
+    "python-envs.pythonProjects": [],
+    "azureTerraform.checkTerraformCmd": false
 }

apps/artagent/backend/api/v1/endpoints/__init__.py

@@ -30,8 +30,9 @@
 - browser.py: Web browser - receives raw PCM audio from mic
 - Both use the same MediaHandler with different transport modes
 - agent_builder.py: REST API for creating dynamic agents at runtime
+- scenario_builder.py: REST API for creating dynamic scenarios at runtime
 """
 
-from . import agent_builder, browser, calls, health, media
+from . import agent_builder, browser, calls, health, media, scenario_builder
 
-__all__ = ["health", "calls", "media", "browser", "agent_builder"]
+__all__ = ["health", "calls", "media", "browser", "agent_builder", "scenario_builder"]

apps/artagent/backend/api/v1/endpoints/browser.py

@@ -295,21 +295,16 @@ async def browser_conversation_endpoint(
                 # Start speech cascade and run message loop
                 await handler.start()
                 await handler.run()
-                logger.debug("[%s] run() completed normally", session_id)
 
         except WebSocketDisconnect as e:
-            logger.debug("[%s] WebSocketDisconnect caught", session_id)
             _log_disconnect("conversation", session_id, e)
         except Exception as e:
-            logger.debug("[%s] Exception caught: %s", session_id, type(e).__name__)
             _log_error("conversation", session_id, e)
             raise
         finally:
-            logger.debug("[%s] finally block starting cleanup", session_id)
             await _cleanup_conversation(
                 websocket, session_id, handler, memory_manager, conn_id, stream_mode
             )
-            logger.debug("[%s] finally block cleanup complete", session_id)
 
 
 # =============================================================================
@@ -647,15 +642,6 @@ def _log_disconnect(endpoint: str, identifier: str | None, e: WebSocketDisconnec
 
 def _log_error(endpoint: str, identifier: str | None, e: Exception) -> None:
     """Log WebSocket error."""
-    # Log the actual exception for debugging
-    logger.error(
-        "[%s] %s error: %s (%s)",
-        identifier,
-        endpoint.capitalize(),
-        str(e),
-        type(e).__name__,
-        exc_info=True,  # Include traceback
-    )
     log_with_context(
         logger,
         "error",