Merge pull request 'docs(release): record the v26.15.0 release notes' (#898) from release/v26.15.0-notes into main

docs/ci-cd.md

@@ -41,6 +41,7 @@ Upstream's final release was **`v26.3.0`** (archived). Our line continues from t
 | `v26.12.0` | **`ErsatzTV.Mcp` MCP server** — read + cautious-write over `/api/v1`, `ERSATZTV_ALLOW_WRITES`-gated (#58). **External channel-logo URLs download + cache at save time** (#525), with the on-screen bug now rendered for external-URL logos (#502). HLS cold-start hardening: burst-read the first segments so start isn't `-readrate`-bound (#350) and floor QSV extra hardware frames so an unthrottled read can't exhaust the pool (#529); remote graphics-engine image fetches bounded — timeout, size cap, decode cap, redirects, pooling (#511). Decision-lifecycle tooling + parallel-orientation startup rewrite (#520/#521); CI `docker build` lane rebalance (#508). |
 | `v26.13.0` | **RuleBuilder maturation** — arbitrary-depth group nesting (#436), inline smart-query authoring in Channel Builder (#437), DB-sourced facet typeahead + relative-date operators + validation (#434/#435/#438), and an artist typeahead covering music-video/song credits with `album_artist` no longer 404ing (#578). **Per-channel On Now/Next transient overlay** (#74/#570) and **per-schedule clock-boundary padding** (#392); in-browser channel preview (#60); Auto-Tune per-source weight steppers + exclude/add-untagged (#440). Library-browse pickers now resolve by search instead of a 100-row window, closing several silent at-cap truncations (#644/#650/#651/#634). Correctness: one watermark resolver for all four attachment points, incl. `MiddleCenter` (#503/#510); QSV HDR tonemaps through OpenCL because `vpp_qsv=tonemap` is a silent no-op (#505); `LibraryFolder` unique index + concurrent-insert tolerance (#491); per-library music-video identity with soft trash (#496); Jellyfin Album/Track music-video projection (#177); metadata-collection dedup (#500); accented facet values via a registered Unicode fold on SQLite (#668); `WorkAheadSlots` atomic slot claim, never a negative count (#536/#539); on-demand guide rebuild on thaw (#68). Process/CI: the H10 review-verdict gate became a sha-bound **required** commit status and was hardened through its false-open chain (#622/#629/#632/#648/#649/#672/#698), the decision corpus split to one YAML-frontmatter record per file (#610/#620), and headless Playwright UI-E2E flows landed (#445/#533). Five dual-provider migrations. |
 | `v26.14.0` | **Live TV no longer starves on embedded bitmap subtitles** — `-readrate` paces an input off its *furthest-behind* stream, and a PGS/DVD subtitle read through the video's own `-i` is sparse enough to drag the whole process to **0.53x realtime** against the 1.0x a client consumes, draining the buffer until the channel stalls. Fixed with a capability-gated `-readrate_catchup` (ffmpeg 8.0+) on realtime inputs, keeping `-readrate` on the frame-producing path so the `ffmpeg.qsv-extra-hw-frames-floor` bound is untouched; measured 0.533x → 1.067x on QSV and software, with a 240s QSV soak clean of allocation errors (#726). Affects items carrying an embedded bitmap subtitle matching the channel's subtitle mode — 3,182 of 24,646 media versions on prod, and a property of the *item*, not the channel, which is why the stall presented as random. Process/CI: the H10 review-verdict gate's repair sentinel became a fixed point and its write is now fenced on the timeline retarget count, closing a raced-sentinel false-open (#706/#707/#711). **The decisions validator now cross-checks its dependency-free frontmatter parse against PyYAML** and reports both the truncating unquoted `` #`` and the scalar-closing bare apostrophe as errors, so a record whose `rule:` silently halves under PyYAML fails the local gate instead of CI (#674/#688) — the ceiling-calibration claim was also split so the suite pins what the derivation MEANS rather than live-corpus order statistics. Dependencies: CliWrap 3.10.4, JetBrains.ReSharper.GlobalTools 2025.3.5. |
+| `v26.15.0` | **`main` became PR-only, which is what makes `review-verdict/h10` load-bearing** — branch protection now carries `enable_push: false` *and* `block_admin_merge_override: true`, so a direct `git push origin HEAD:main` is refused at pre-receive for every account including a site admin, and an admin cannot force-merge past a missing or red required context (#743/#749). Gitea only evaluates `status_check_contexts` on the PR merge path, so before this the whole gate was skippable with no forgery needed. The gate was then hardened through the rest of its false-open chain: CI's registry credential scoped so a head-resolved workflow cannot forge the status (#697), a stray expression delimiter **in a comment** that killed the gate outright and is now banned on the release path itself by a `scan` job `build` depends on (#751/#767), a positive verdict inherited only from an allow-listed reviewer (#742), the PR-timeline `HEAD` alias fenced on the `pull_push` count (#803/#664), and both `/statuses/{sha}` reads paged to a validated terminator (#763). App-facing: **FFmpeg profile numeric fields are bounded with a 422 that names the bound and its consequence** instead of being silently rewritten, and readrate pacing is exposed as a profile field (#735 — one dual-provider migration, `Add_FFmpegProfile_ReadRatePacing`). **On Now / Next gets a boxed background and is on by default** (#732). Field-level progressive disclosure lands as a shared `FieldHelp` trigger + portalled panel, adopted on FFmpeg Profiles and documented as `docs/spa-conventions.md` §15 (#734). Auto-Tune proposal rows align on a grid (#721); `AddItemsDialog` resolves by search instead of windowing a whole media-library type, with stale-response and is-mounted guards (#685/#740). Correctness: a paged handler now counts **the same query it pages**, so a filtered page stops reporting the unfiltered total across playouts, rerun collections and six sibling handlers (#690/#758); nullable primitive collections are guarded at the read site rather than mutated on a tracked entity — `SongMetadata.Artists` in both search indexers (#701/#824) and the scheduling `DaysOfMonth`/`MonthsOfYear`/`DaysOfWeek` columns, where a runtime NULL reads as **unrestricted** (#823); SPA full-replace bodies are built as `Complete<T>` so an omitted optional DTO field is a type error (#807); and every `ErsatzTV.Mcp` tool is pinned to its OpenAPI contract, with `graphicsElementIds` and `padToNearestMinute` declared so an MCP channel update stops silently stripping the overlay (#754/#757). Process/CI: one rule for how a guard derives its population and one for the proof it ships with, both enforced (#774/#775) — populations come from the git index, never a filesystem walk (#806/#819), every `MUTATION` grade is executed each suite rather than asserted in prose (#790), and verification code is itself code under test (#796). Workflows declare their own per-job metadata and guard populations derive from it (#786/#789); all six declare `permissions:` (#748); `ci-image.yml` publishes from `main` only and the persisted checkout credential is gone (#744/#746/#835). Hooks report their own execution and the report is measured (#776), and `docs.no-session-narrative` was generalized to every durable artifact and the sites its sweep IDENTIFIED were remediated as judgements rather than by regex — no closure is claimed over a phrasing space (#784/#812). A ruff config is committed and enforced in CI (#780). Dependencies: Scriban.Signed 7.2.6. **Cut at `736649b3b`, not at `main`'s head**: `completeAnnotations.guard.test.ts` (merged in the very next commit) needs a git index the Dockerfile's `web-build` stage does not have, so every image build after `736649b3b` fails — including a tag build (#887). `736649b3b` is the newest commit whose `Build & push image (amd64)` actually ran green. The scheduling-recurrence fix #880 therefore slips to the next release. |
 
 **Before cutting a release — sweep `docs/decisions.md` + `docs/decisions/`** (ersatztv#521, supersedes
 the ersatztv#303 H9 append-only ritual). Supersession/retirement is now a same-PR act (add the new