Add toggle for auto-commit and push on CLAUDE.md updates

[severity1]

Summary

Add a configuration option to automatically commit and push changes when CLAUDE.md files are updated by the memory-updater agent.

Motivation

Currently, when the memory-updater agent updates CLAUDE.md files, the changes remain as local modifications. Users who want these changes committed and pushed to their repository must do so manually. An auto-commit/push toggle would:

• Reduce manual steps for teams who want CLAUDE.md always in sync with remote
• Allow opt-in behavior for users who prefer automatic version control
• Keep the current manual workflow as the default for users who want control

Proposed Solution

Add configuration options in .claude/auto-memory/config.json:

{
  "triggerMode": "default",
  "autoCommit": false,
  "autoPush": false
}

• autoCommit: When true, automatically commit CLAUDE.md changes after updates
• autoPush: When true, push commits to remote (only applies if autoCommit is also true)

Implementation Notes

• Default both options to false to preserve current behavior
• Commit message format: chore: update CLAUDE.md [auto-memory]
• Only commit CLAUDE.md files, not other staged changes
• Handle push failures gracefully (log warning, don't block workflow)

Acceptance Criteria

• Add autoCommit and autoPush config options
• Update memory-updater agent to check config and perform git operations
• Add documentation for new options
• Add tests for auto-commit/push behavior