- dream_scheduler.py: explicit-level filter on execute_dream session lookup
(baseline and session pick must agree on the same document set)
- crud.collection.get_collection: optional with_for_update flag for callers
that need serialized read-modify-write on internal_metadata
- enqueue.py + orchestrator.py: pass with_for_update=True on the RMW reads
to close the TOCTOU between concurrent enqueue and completion writes
Follow-up filed for jsonb_set-based nested updates (docs/factory/backlog/).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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