feat: implement ensure_publication for zero_publication management

- Added the ensure_publication function to create and verify the zero_publication if it is missing, ensuring idempotency during database initialization.
- Integrated ensure_publication into the create_db_and_tables function to prevent zero-cache crash loops on startup.
- Introduced a self-check script to validate the ensure_publication functionality on a create_all-bootstrapped database.
- Updated various components to reflect the transition from search space to workspace, including adjustments in imports and routing paths.

surfsense_web/tests/helpers/api/chat.ts

@@ -24,7 +24,7 @@ export async function streamChatToCompletion(
 		headers: authHeaders(token),
 		data: {
 			chat_id: args.threadId,
-			search_space_id: args.searchSpaceId,
+			workspace_id: args.searchSpaceId,
 			user_query: args.query,
 		},
 	});