Plain functions imported as class attributes in APIServerAdapter get
auto-bound as methods via Python's descriptor protocol. Every
self._cron_*() call injected self as the first positional argument,
causing TypeError on all 8 cron API endpoints at runtime.
Wrap each import with staticmethod() so self._cron_*() calls dispatch
correctly without modifying any call sites.
Co-authored-by: teknium <teknium@nousresearch.com>
Five improvements to the /api/jobs endpoints:
1. Startup availability check — cron module imported once at class load,
endpoints return 501 if unavailable (not 500 per-request import error)
2. Input limits — name ≤ 200 chars, prompt ≤ 5000 chars, repeat must be
positive int
3. Update field whitelist — only name/schedule/prompt/deliver/skills/
repeat/enabled pass through to cron.jobs.update_job, preventing
arbitrary key injection
4. Deduplicated validation — _check_job_id and _check_jobs_available
helpers replace repeated boilerplate
5. 32 new tests covering all endpoints, validation, auth, and
cron-unavailable cases
