531-line completion report for Tier 1 review covering:
- Goal & scope (per spec)
- 7 phases of delivery (per commit)
- 6 plan deviations to flag (CRITICAL: 7 production-affected test files
+ 4 follow-up mock fixes were missed in the original spec; the user's
stated mass-rename send_result->send plan; the track was done on
master not a feature branch)
- Files changed (per category)
- Verification (per the spec's 15 verification criteria)
- Definition of Done
- Recommended next track (send_result -> send rename)
- Tier 1 review checklist