feat add connections management and health summary improvements

backend/src/core/database.py

@@ -14,6 +14,7 @@
 from sqlalchemy import create_engine, inspect, text
 from sqlalchemy.orm import sessionmaker
 from ..models.mapping import Base
+from ..models.connection import ConnectionConfig
 # Import models to ensure they're registered with Base
 from ..models import task as _task_models  # noqa: F401
 from ..models import auth as _auth_models  # noqa: F401
@@ -22,6 +23,7 @@ from ..models import llm as _llm_models  # noqa: F401
 from ..models import assistant as _assistant_models  # noqa: F401
 from ..models import profile as _profile_models  # noqa: F401
 from ..models import clean_release as _clean_release_models  # noqa: F401
+from ..models import connection as _connection_models  # noqa: F401
 from .logger import belief_scope, logger
 from .auth.config import auth_config
 import os
@@ -281,6 +283,23 @@ def _ensure_git_server_configs_columns(bind_engine):
 # [/DEF:_ensure_git_server_configs_columns:Function]
 
 
+# [DEF:ensure_connection_configs_table:Function]
+# @PURPOSE: Ensures the external connection registry table exists in the main database.
+# @PRE: bind_engine points to the application database.
+# @POST: connection_configs table exists without dropping existing data.
+def ensure_connection_configs_table(bind_engine):
+    with belief_scope("ensure_connection_configs_table"):
+        try:
+            ConnectionConfig.__table__.create(bind=bind_engine, checkfirst=True)
+        except Exception as migration_error:
+            logger.warning(
+                "[database][EXPLORE] ConnectionConfig table ensure failed: %s",
+                migration_error,
+            )
+            raise
+# [/DEF:ensure_connection_configs_table:Function]
+
+
 # [DEF:init_db:Function]
 # @PURPOSE: Initializes the database by creating all tables.
 # @PRE: engine, tasks_engine and auth_engine are initialized.
@@ -295,6 +314,7 @@ def init_db():
         _ensure_llm_validation_results_columns(engine)
         _ensure_user_dashboard_preferences_health_columns(engine)
         _ensure_git_server_configs_columns(engine)
+        ensure_connection_configs_table(engine)
 # [/DEF:init_db:Function]
 
 # [DEF:get_db:Function]