FIX7 Implementation Specification Completion

Status FIX7_IMPLEMENTATION_SPEC_COMPLETE_READY_FOR_T1_REVIEW. This package supersedes earlier direct implementation-ready claims. T1 must review it first.

Fixed decisions: PG16 and pgcrypto SHA-256 only; qt001_cp owner qt001_cp_owner NOLOGIN; critical quorum exact 3 OPERATOR_MIGRATION/CODEX_REVIEWER/T2_HUMAN_REVIEWER; standard quorum exact 2 OPERATOR_MIGRATION/CODEX_REVIEWER; approvals max 24h and invalidate on hash/epoch/scope/principal/evidence drift; post-activation verifier deadline 15 minutes; no manual SQL; all live actions operator-gated; Stage 2.6B/permit/REAL_RUN/apply blocked.

Package docs 01-13 define issue matrix, manifest engines, readiness, signoff/evidence, capability, hash, analyzer, epoch, Level-B runbook, T1 boundary, rollback, 20-point self-check and verdict.