OpenClaw Signals: System Probes, Safe Recursive Deletion, and the Git History Hunt

Tools

Add system probe implementations

This PR adds system probe implementations, giving builders more visibility into what's happening under the hood. Useful for debugging and monitoring production systems without guesswork.

Add safe recursive deletion utilities

Safe recursive deletion is one of those things you don't think about until you delete the wrong thing at 2am. Good to see this getting proper tooling support.

Add git history navigation utilities

Git history navigation utilities mean less time wrestling with command line git archaeology. The kind of utility that compounds over time when you're trying to trace how something broke.

Bug

Ongoing OOM debugging under concurrency loads

The OOM saga continues. Issue #1559 tracks the persistent out-of-memory problems when running multiple OpenClaw instances concurrently. Still being actively debugged.