docs: log Phase 4 cinematic pass progress

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Bg76sLc43Wc3j5ZcLkboYR

docs/cinematic-highlight-poc-plan.md

@@ -129,6 +129,21 @@ Ranked from the first render's evidence:
   real `car` label (was GENERIC_VLOG@0.25/filename heuristic). mvn verify 247/0/0/0. AGPL + loopback caveats
   recorded. Remaining: P3.5 music/SFX fit, P3.6 frozen thresholds + blinded review.
 
+### Phase 4 — Cinematic pass (after human review: "not genuinely cinematic")
+Human Gate-B verdict on the Phase-3 output: functional, not cinematic. Direction chosen: dynamic editing,
+better music, NO voiceover, bolder finish. Done so far (commit 842f2a7):
+- [x] **No voiceover** — validator made VO optional; new plan carries none (music + SFX driven).
+- [x] **2.39:1 letterbox + film grain** in the renderer; overlays raised above the bar.
+- [x] **Slow-motion hero** (plan: hero source span < target → 0.67x) + beat-specific bold grade.
+- [x] **Stronger music direction** — driving orchestral/hybrid prompts (still `musicgen-small`).
+- [ ] **Push-in / Ken Burns** — prototyped via time-based `crop` zoom; INVALID (FFmpeg crop can't use `t`
+      for w/h). Reverted. Redo with `zoompan` as a follow-up.
+- [ ] **Bigger music model** — `musicgen-medium` download stalled + is very slow on CPU; deferred. Consider
+      medium, one continuous score across the piece, or licensed production music.
+- [ ] Re-run human Gate B on the cinematic cut.
+Verified: mvn 247/0; final −16.5 LUFS, TP −2.7 dBTP, 1080p, no VO. Deliverable:
+`output/localpoc/highlight-projects/dji_21230510013241_0091_d/final.mp4`.
+
 ## Deferred (until output-quality gate passes)
 Production hardening: Spring Security/OIDC, PostgreSQL/Testcontainers, containers/K8s, CI/CD, distributed
 ops, digest-bound authenticated approval. Recorded, not deleted.