Prevents environment variable leaking between tests. All DATA_DIR, JWT_SECRET_KEY, and SCRIPT_TIMEOUT assignments in fixtures now use monkeypatch.setenv() which auto-reverts after each test. Removes manual os.environ.pop() cleanup lines.
Major additions: - Web UI: Jinja2 templates in FastAPI (login, dashboard, catalog, corporate memory, admin) - API: catalog profiles/metrics, telegram verify/unlink/status, admin table registry CRUD - Corporate memory governance: approve/reject/mandate/revoke/edit/batch + audit log - Sync: real DataSyncManager trigger, sync-settings, table-subscriptions - CLI: setup (init/test/deploy/verify), server (logs/restart/deploy/backup), explore - Instance config integration (instance.yaml loaded at startup) - 140 tests passing (25 new)
