integration: Add Browser-Use Agent Integration with Persistent Step WAL

[sdageltc]

Description

browser-use is rapidly becoming the standard for multi-turn web automation agents. However, browser sessions frequently drop or crash during long-horizon workflows (e.g., 20-step form submissions, data scraping, multi-page auth).

Proposed Integration

Create a reference cookbook examples/cookbooks/browser_use_durable.py showing how to wrap browser-use agent steps with LetItLoop's @durable_async:

1. Checkpoint each navigation/interaction step to LILWAL02.
2. On browser crash or spot instance eviction, resume the agent from the last verified page state without repeating earlier actions.
3. Protect irreversible actions (e.g. checkout click, payment submit) with atomic_marker.

Requirements

• Provide a standalone script in examples/cookbooks/browser_use_durable.py with mock/demo mode.
• Add unit/integration test in tests/test_cookbooks.py.
• Documentation with ASCII architectural diagram.

We welcome PRs from the community!