Test: test1239-feishu-correlation-store
Date: 2026-08-27
Scope: Feishu IM correlation store, pure logic only.

Commands:
- cd agent-network && bun test src/im/correlation-store.test.ts
- cd agent-network && npm run typecheck

Result:
- PASS: 6 tests, 17 assertions.
- PASS: TypeScript typecheck.

Notes:
- Docker was intentionally not run for this step: the change is a standalone
  data-structure/store PR and current ops guidance pauses Docker builds.
- No real Feishu/Lark app was contacted.
- No production IM probe messages were sent.
- No FEISHU_APP_SECRET values were used or logged.
