M0a of the render-pipeline plan (docs/zh/plans/render-pipeline-threads.md):
- oak-node: every payload push site (58 across footage.rs, plugin.rs
and the nodes/* effects) now boxes the Job enum instead of the raw
payload. The enum gains CacheJob with a CacheJobPayload (path +
time + fallback value, the C++ cachejob.h shape), plus safe as_*
accessors and unsafe probe helpers beside job_ref.
- oak-render: RenderEvalHooks::resolve is one loop over the table —
a single get_checked::<Job> probe per texture value, a match
dispatch to process_footage/shader/plugin/color_transform/cache,
and recursive resolution of the job boxes embedded in a payload's
inputs (depth-capped, cycle-guarded) — replacing the four
sequential full-table scans (resolve_*_jobs, deleted).
- The disk frame cache is real: frameio.rs implements a minimal
self-describing F32 container (magic/version/dims/format/timestamp
+ payload, tmp-write + atomic rename, full header validation on
load) because the OIIO bridge is a stub and EXR is unavailable in
this build; process_cache_job genuinely reads the file before
falling back to the job's (already resolved) fallback value.
- Tests: CacheJob roundtrip (save -> resolve -> pixel equality),
missing-file fallback, nested cache-job-through-shader resolution,
plus four frameio container tests. 2330 passed, 0 failed across
the workspace.