feat(logging): implement configurable belief state logging

- Add LoggingConfig model and logging field to GlobalSettings
- Implement belief_scope context manager for structured logging
- Add configure_logger for dynamic level and file rotation settings
- Add logging configuration UI to Settings page
- Update ConfigManager to apply logging settings on initialization and updates

backend/src/api/routes/environments.py

@@ -15,6 +15,7 @@ from backend.src.dependencies import get_config_manager
 from backend.src.core.superset_client import SupersetClient
 from superset_tool.models import SupersetConfig
 from pydantic import BaseModel
+from backend.src.core.logger import logger
 # [/SECTION]
 
 router = APIRouter(prefix="/api/environments", tags=["environments"])
@@ -38,7 +39,9 @@ class DatabaseResponse(BaseModel):
 # @RETURN:  List[EnvironmentResponse]
 @router.get("", response_model=List[EnvironmentResponse])
 async def get_environments(config_manager=Depends(get_config_manager)):
+    logger.info(f"[get_environments][Debug] Config path: {config_manager.config_path}")
     envs = config_manager.get_environments()
+    logger.info(f"[get_environments][Debug] Found {len(envs)} environments")
     return [EnvironmentResponse(id=e.id, name=e.name, url=e.url) for e in envs]
 # [/DEF:get_environments]