feat add connections management and health summary improvements

backend/src/app.py

@@ -16,13 +16,14 @@ from starlette.middleware.sessions import SessionMiddleware
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.staticfiles import StaticFiles
 from fastapi.responses import FileResponse
-import asyncio
-
-from .dependencies import get_task_manager, get_scheduler_service
-from .core.utils.network import NetworkError
-from .core.logger import logger, belief_scope
-from .api.routes import plugins, tasks, settings, environments, mappings, migration, connections, git, storage, admin, llm, dashboards, datasets, reports, assistant, clean_release, clean_release_v2, profile, health
-from .api import auth
+import asyncio
+
+from .dependencies import get_task_manager, get_scheduler_service
+from .core.encryption_key import ensure_encryption_key
+from .core.utils.network import NetworkError
+from .core.logger import logger, belief_scope
+from .api.routes import plugins, tasks, settings, environments, mappings, migration, connections, git, storage, admin, llm, dashboards, datasets, reports, assistant, clean_release, clean_release_v2, profile, health
+from .api import auth
 
 # [DEF:App:Global]
 # @SEMANTICS: app, fastapi, instance
@@ -39,12 +40,13 @@ app = FastAPI(
 # @PRE: None.
 # @POST: Scheduler is started.
 # Startup event
-@app.on_event("startup")
-async def startup_event():
-    with belief_scope("startup_event"):
-        scheduler = get_scheduler_service()
-    scheduler.start()
-# [/DEF:startup_event:Function]
+@app.on_event("startup")
+async def startup_event():
+    with belief_scope("startup_event"):
+        ensure_encryption_key()
+        scheduler = get_scheduler_service()
+    scheduler.start()
+# [/DEF:startup_event:Function]
 
 # [DEF:shutdown_event:Function]
 # @PURPOSE: Handles application shutdown tasks, such as stopping the scheduler.