🔧(frontend) pass recording max duration to frontend for user alerts

Send backend recording duration limit to frontend to display warning
messages when recordings approach or reach maximum allowed length.

This configuration needs to be synced with the egres. I chose to keep
this duration in ms to be consistent with other settings.

src/backend/core/api/__init__.py

@@ -41,6 +41,7 @@ def get_frontend_configuration(request):
             "is_enabled": settings.RECORDING_ENABLE,
             "available_modes": settings.RECORDING_WORKER_CLASSES.keys(),
             "expiration_days": settings.RECORDING_EXPIRATION_DAYS,
+            "max_duration": settings.RECORDING_MAX_DURATION,
         },
         "telephony": {
             "enabled": settings.ROOM_TELEPHONY_ENABLED,

src/backend/meet/settings.py

@@ -525,6 +525,11 @@ class Base(Configuration):
     RECORDING_EXPIRATION_DAYS = values.IntegerValue(
         None, environ_name="RECORDING_EXPIRATION_DAYS", environ_prefix=None
     )
+    # Recording max duration in milliseconds - must be synced with LiveKit Egress configuration
+    # Set to None for no max duration
+    RECORDING_MAX_DURATION = values.IntegerValue(
+        None, environ_name="RECORDING_MAX_DURATION", environ_prefix=None
+    )
     SUMMARY_SERVICE_ENDPOINT = values.Value(
         None, environ_name="SUMMARY_SERVICE_ENDPOINT", environ_prefix=None
     )

src/frontend/src/api/useConfig.ts

@@ -29,6 +29,7 @@ export interface ApiConfig {
     is_enabled?: boolean
     available_modes?: RecordingMode[]
     expiration_days?: number
+    max_duration?: number
   }
   telephony: {
     enabled: boolean