docs: richer report — data figures, success/failure frames, commit-pinned repo links

- experiment_charts.py generates 4 figures from experiments/ artifacts:
  held-out per-film F1, 16-combo ranking, DE search landscape, and the
  Downton detector-vs-tracker ghost timeline (replaces the blank
  title-card screenshot)
- new frames: 19-correct wedding shot (success case), Many Saints
  ghost-vs-unknown frame (three error classes in one image)
- rename rep4-optimizer-results.md -> model-bakeoff.md; rep4 kept only
  as the on-disk artifact prefix, explained once
- repo file references are now links via https://REPOLINK/<path>
  placeholders; build_site.sh pins them to the HEAD commit's raw URLs
  and fails the build if a linked path doesn't exist at HEAD
- drop references to removed scripts (scene_score.py, score_config.py)
  and to session-memory names; mark artifact-registry paths with their
  pull commands
- commit readme_example.jpg + pipeline_topology.svg so README renders
  on the plain Gitea repo view
- deploy_pages.sh: push built site/ to the gitea-pages branch

docs/service-conversion.md

@@ -34,12 +34,12 @@ lock-gating, not new pipeline logic.
 | Piece | Where | What it does |
 |---|---|---|
 | Analysis engine | `build/scene_analyze` | Video → face detect/align/embed → gallery match → result JSON |
-| Backend selection | `CMakeLists.txt` (`SAE_INFERENCE_BACKEND`, `SAE_GEMM_BACKEND`) | ORT/TRT + ROCm/CUDA, chosen **at build time** |
+| Backend selection | [`CMakeLists.txt`](https://REPOLINK/CMakeLists.txt) (`SAE_INFERENCE_BACKEND`, `SAE_GEMM_BACKEND`) | ORT/TRT + ROCm/CUDA, chosen **at build time** |
 | New-media queue | JRay plugin → `GET /Plugins/JRay/Tasks/Pending` | Backlog of items with no results yet |
-| Worker loop | `run_from_jellyfin.py --worker` | Poll Pending → run `scene_analyze` → push results |
+| Worker loop | [`scripts/run_from_jellyfin.py`](https://REPOLINK/scripts/run_from_jellyfin.py)` --worker` | Poll Pending → run `scene_analyze` → push results |
 | Result push | `PUT /Plugins/JRay/Items/{id}/Truth` | Stores per-actor scene windows back in Jellyfin |
-| Incremental gallery | `make_jellyfin_gallery.py --merge` | Embeds only cast not already in the gallery |
-| Secrets loader | `.env` via `sae_env.py` | `JELLYFIN_URL`, `JELLYFIN_API_KEY`, `TMDB_API_KEY` |
+| Incremental gallery | [`scripts/make_jellyfin_gallery.py`](https://REPOLINK/scripts/make_jellyfin_gallery.py)` --merge` | Embeds only cast not already in the gallery |
+| Secrets loader | `.env` via [`scripts/sae_env.py`](https://REPOLINK/scripts/sae_env.py) | `JELLYFIN_URL`, `JELLYFIN_API_KEY`, `TMDB_API_KEY` |
 
 ## Installer config