Add server dbpurgeage warning state in API and mark task complete

backend/app/models/server.py

@@ -56,3 +56,7 @@ class ServerSettingsResponse(BaseModel):
     model_config = ConfigDict(strict=True)
 
     settings: ServerSettings
+    warnings: dict[str, bool] = Field(
+        default_factory=dict,
+        description="Warnings highlighting potentially unsafe settings.",
+    )

backend/app/services/server_service.py

@@ -160,8 +160,12 @@ async def get_settings(socket_path: str) -> ServerSettingsResponse:
         db_max_matches=db_max_matches,
     )
 
-    log.info("server_settings_fetched")
-    return ServerSettingsResponse(settings=settings)
+    warnings: dict[str, bool] = {
+        "db_purge_age_too_low": db_purge_age < 86400,
+    }
+
+    log.info("server_settings_fetched", db_purge_age=db_purge_age, warnings=warnings)
+    return ServerSettingsResponse(settings=settings, warnings=warnings)
 
 
 async def update_settings(socket_path: str, update: ServerSettingsUpdate) -> None: