Record completed P0 and P1 hardening

[kim-em]

Summary

• record the exact deployed submissions and leaderboard checkpoints
• mark the aligned intake guidance and bounded production lifecycle readback complete
• point lower-priority findings to the single deferred triage issue
• mark launch-phase P0/P1 hardening complete without adding a run history

Verification

• git diff --check origin/main...HEAD
• protected production submission reached accepted result with a completed encrypted archive and scheduled release
• final production State validation and Worker deployment passed