feat(cron): add executions prune/clear CLI commands (#59909)

[webtecnica]

Summary

Cron job execution history accumulates indefinitely under ~/.hermes/cron/output/<job_id>/, with no way to clean it. This adds CLI commands to manage it.

Changes

hermes cron executions prune --older-than 7d

Deletes execution output files older than N days/hours/minutes/seconds. Useful for automated cleanup (can be run as a cron job itself).

hermes cron executions clear --job-id <id> / hermes cron executions clear --all

Clears execution history for a specific job or all jobs.

Implementation

• Parser: hermes_cli/subcommands/cron.py — new executions subcommand with prune and clear sub-parsers
• Handler: hermes_cli/cron.py — _cron_executions() function reading from ~/.hermes/cron/output/
• Gracefully handles missing output directory, invalid --older-than format, and non-existent job IDs

Files Changed

File	Δ
hermes_cli/subcommands/cron.py	+22 lines
hermes_cli/cron.py	+66 lines

Closes #59909

[webtecnica]

@teknium1 Ready for review. New CLI commands hermes cron executions prune --older-than 7d and hermes cron executions clear --job-id <id> | --all for managing accumulated execution history. 88 lines total. 🙏

[teknium1]

Thanks for the cleanup proposal. This is an automated hermes-sweeper review; current main already covers the reported retention and CLI cleanup needs.

• cron/jobs.py:2192-2193 prunes per-job output on every save using cron.output_retention (default 50); this shipped in e4ff4948604d8da69f95ed1e555678d23de1ca18 and is contained in v2026.7.1.
• The desktop's cron-history list is SessionDB-backed (hermes_cli/web_server.py:10514-10544), rather than derived from cron/output/ files.
• The existing hermes sessions prune --source cron path deletes those cron sessions, with --older-than for age-bounded cleanup and a preview/confirmation flow (hermes_cli/main.py:14469-14563).

Because the current implementation already provides retention for output files and a CLI purge for the desktop-visible run history, this PR is redundant.