Cache::lock keyed by memory id wraps the delete path in BrainService::
forget(); supersede cleanup in remember() lifted to the same idiom.
forget() now ALWAYS queues DeleteFromIndex on a successful delete
(was previously skipped when indexed_at was null — left late writes
from stale preloaded models a window to land entries after the
underlying memory was gone).
Index write paths (qdrantUpsert / elasticIndex) re-check that the
memory row still exists before writing — defence-in-depth against any
future caller that holds a stale model reference past a forget.
Pest coverage extended in SupersedeForgetIndexCleanupTest:
- never-indexed forget queues cleanup
- late stale-model index writes are skipped after forget
- never-indexed supersede cleanup queues deletion
- late stale-model index writes are skipped after supersede
Co-authored-by: Codex <noreply@openai.com>
Closes tasks.lthn.sh/view.php?id=999
b6565263f3