Two live cron bugs, both surfaced by @banditburai in #35616 (whose larger
watchdog/supervisor work is already superseded by the CronScheduler provider
refactor on main):
- #32896: `cron list` crashed on a present-but-null `deliver` field —
`job.get("deliver", ["local"])` returns None for an explicit null, which
then hit `", ".join(None)`. Coalesce with `or ["local"]` (same pitfall
the sibling `repeat` line already guards against).
- #33465: cron jobs 401'd on Bitwarden/BSM-backed secrets. The per-run env
reload used a bare `load_dotenv(override=True)`, which re-applied only the
.env placeholder — startup had already recorded this HERMES_HOME in
env_loader._APPLIED_HOMES, so the external-secret re-pull no-oped. Route the
reload through load_hermes_dotenv() and call reset_secret_source_cache()
first to force the re-pull (Bitwarden's 300s value-cache keeps it off the
network; override honours secrets.bitwarden.override_existing, mirroring
startup).
Tests: null-deliver regression guard in test_cron.py; reset-before-reload
ordering guard in test_scheduler.py. Migrated 31 scheduler-reload test seams
from patching dotenv.load_dotenv to the new load_hermes_dotenv /
reset_secret_source_cache seam.
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