chore(lint): remove unused vars and imports

- agents-crud: drop unused roleLevel local + inferRoleLevel import
- agents-hierarchy: prefix unused builder params with _
- company-settings: drop InboxItem import, prefix unused builder params
- worker-message-handler: drop unused WorkerServiceDependencies import

src/main/worker/worker-message-handler.ts

@@ -1,4 +1,4 @@
-import type { WorkerServiceDependencies, workerMessageSchema } from "./worker-types";
+import type { workerMessageSchema } from "./worker-types";
 import { handleRunLog } from "./handlers/run-log-handler";
 import { handleRunStatus } from "./handlers/run-status-handler";
 import { handleRunFinished } from "./handlers/run-finished-handler";