fbcd114f8d
Seven rounds of multi-model review across five models (DeepSeek, MIMO 2.5 Pro, GPT-5.5 Pro, Opus 4.7, Opus 4.8) with zero remaining P0/P1/P2 findings. Coverage final: contracts 100%, events (55 durable + 7 ephemeral) 100%, DB schema (16+1+2 tables) 100%, state machines (6 of 6) 100%, forbidden edges (10 of 10) enforced, UML class diagrams (8 of 8) verified. §23 checklist now split into design-verified (all checked) and implementation-entry gates (to verify as code is written). Frozen. Proceed to implementation. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>