- Rename the lifespan-local `transport` to `ingest_transport` in both paths so it
no longer shadows the get_app(transport=...) HTTP-transport parameter.
- Log the memory backend selection in build_transport, symmetric with the
postgres branch, so startup logs name the chosen ingest backend either way.
- Note in _wire_vector_sync_state why eviction_task_group is intentionally not
set there (it only exists once the lifespan's task group is running).
Refs: Deck #196
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
