- Take `Arc<Catalog>` by value again through the validation entry points.
`AppState::catalog()` returns an owned `Arc`, so `&state.catalog()` was
cloning, borrowing the temporary, then cloning again at the leaf. Every
consumer ends up owning the `Arc`, so by-value is the honest shape and it
drops one clone per call. The one caller holding the catalog in a field
now says `Arc::clone(&self.catalog)` explicitly.
- Correct the `RenderMode` doc comment. It claimed `Strict` is "used by
run-create", but run-create renders `Structural` and promotes the
resulting warnings to errors itself; `Strict` has no production caller.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
- Add AppState::cached_run with the standard 500/404 mapping and use it
everywhere handlers read the shared run-projection cache. This also
normalizes two inconsistencies: graph-source cache errors now map to
500 (was 502), and a missing projection in PR create/unlink now maps
to the canonical 404 (was a bespoke 500).
- Extract an EventScan cursor shared by the four run-event scan loops,
delegate list_events_from to the paginated variant, and stop the
stage-event scan once its page is full instead of walking the rest of
the log.
- Hold Arc<RunProjection> in the local projection cache so opening a run
no longer deep-copies the projection (copy-on-write via Arc::make_mut),
and drop the now-unreachable shared-cache branch in last_event_seq.
- Trim hot-path clones: run_files serves the projection Arc directly,
run-state serializes by reference, artifacts only checks existence, and
the command-log handler opens a reader only for the CAS-blob branch.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
