Layer on the load-boundary flatten: when load_jobs() encounters an
ID-keyed jobs map ({"jobs": {"<job_id>": {...}, ...}} — written by
external tools or hand edits, never by save_jobs()), it now not only
flattens to the list contract but persists the canonical
{"jobs": [...]} form back to disk via the existing auto-repair path
(save_jobs), so the store self-heals and subsequent reads are
idempotent.
Note: _peek_jobs_unlocked() intentionally does NOT tolerate the dict
shape — it returns None so the save path never shrink-merges against
an unrepaired baseline. The flatten + repair live only at the
load_jobs() boundary.
Regression tests cover the flatten, the reported list_jobs() traceback
path, idempotent on-disk repair, and the empty-map edge case.
Salvaged from PR #92994.
Co-authored-by: a-yeyang <88581400+a-yeyang@users.noreply.github.com>
Teknium
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