v9.14.1 (2026-06-22) — tech-debt cleanup, 12 atomic commits + remote polish merge

Branch: feat/production-upgrade

This tag now points to the merge commit (6d33f4f) that integrates:
- My 12 atomic commits (H-8 Tier 1 follow-up, observability, tech debt)
- Remote's 10+ polish commits (splash, budget, desktop, key centralization)

Summary of changes since v9.14.0:
- H-8 Tier 1 follow-up: cost tracking for guarded_call + BaseLLMClient
  + AsyncLLMClient now actually works (4 silent-failure bugs fixed).
- 5 missing Prometheus counters wired (API_REQUESTS, RATE_LIMIT_HITS,
  CACHE_HITS, VERIFICATION_RUNS, DISCOVERIES_GENERATED).
- OpenAPI contract: 9 missing operationIds fixed.
- mypy regression gate: scripts/check_mypy_regression.py with
  61-error baseline.
- 24 Phase 1 reorg branches DELETED; archive/phase1-reorg-2026-06-08
  tag preserves the work.
- pre-commit hook installed locally; .secrets.baseline refreshed
  (103 known false positives).
- docs/DEFERRED.md captures 5 explicit deferrals (P2-D, P4, P2-A A2,
  P3-3, Phase 1 reorg) with verbatim REWORK_PLAN rationale.
- Remote polish: splash animation, budget key centralization, desktop
  port (mac/win), TUI v9 minor improvements.

Audit ref: 2026-06-22