anti 588ea4e411 refactor(artifacts): extract shard-finder out of transcripts router ...

Move `_find_shard_with_sid`, `_resolve_shard`, `_validate_names`,
`_get_index`, and the index cache from
`decnet/web/router/transcripts/api_get_transcript.py` into
`decnet/artifacts/shards.py`. The shared module speaks
`ValueError`; the router keeps thin wrappers that translate to
`HTTPException(400)` so the route's error UX is unchanged.

This unblocks the BEHAVE-INTEGRATION Phase 4 worker wiring — the
profiler worker (and the collector's session aggregator) need to
disk-reach asciinema shards but must not import from a FastAPI
router.

11 new unit tests for the shared helper. Existing transcript router
tests pass (the shard fixture's monkeypatch points at the shared
module's ARTIFACTS_ROOT now).

2026-05-08 18:49:11 -04:00

7.8 KiB

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