claude-code-hermit: migrate heartbeat from CronCreate to CC Monitor

[gtapps]

Summary

• claude-code-hermit: migrate heartbeat from CronCreate to CC Monitor
• Merge pull request heartbeat: schedule via CronCreate to bypass CC 2.1.150 /loop prompt #127 from gtapps/fix/heartbeat-cron-bypass-loop-prompt

Verification

• Tests: pass (14.1s)

Fixes #128

[gtapps]

Code review

Found 1 issue:

1. session-close/SKILL.md line 15 is stale immediately on landing: the line gets rewritten from /loop to CronCreate, but this PR is the one migrating heartbeat away from CronCreate to CC Monitor. The new wording will mislead operators (and an LLM following the skill) into thinking heartbeat is still a CronCreate entry and reaching for CronDelete rather than TaskStop. Should reference the Monitor (or just "the heartbeat") instead.

claude-code-hermit/plugins/claude-code-hermit/skills/session-close/SKILL.md

Lines 13 to 17 in 663f447

	Idle transitions happen automatically at task boundaries (handled by the `session` skill). By the time the operator runs `/session-close`, they want out.
	If heartbeat is running, stop it before archiving. **Skip on `--auto`** — heartbeat is the caller; stopping its CronCreate would prevent all future ticks.
	If watches are registered (`state/monitors.runtime.json` has entries), stop all watches before archiving — invoke `/claude-code-hermit:watch stop --all`.

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[gtapps]

@copilot resolve the merge conflicts in this pull request

[Copilot]

@copilot resolve the merge conflicts in this pull request

Resolved by merging origin/main into this branch in bad3c5e. The branch is now conflict-free and tests still pass (bash tests/run-all.sh).