Round-3 review nits on PR #920 (none blocking):
- escalation_tiers_signature: TODO noting future settings that can rescue a
previously-terminal document (a toggleable llm tier, a raised oversize cap)
should be folded into the signature so raising them auto-retries dead-letters.
- Terminal-path placeholder cleanup: a delete failure here is real Qdrant I/O,
not control-flow -- log at warning (was debug) for observability. Non-fatal
(the durable marker is already written).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
