chore(deps): bump shaka-player from 5.2.4 to 5.2.12 (#1836)

* chore(deps): bump shaka-player from 5.2.4 to 5.2.12

Bumps [shaka-player](https://github.com/shaka-project/shaka-player) from 5.2.4 to 5.2.12.
- [Release notes](https://github.com/shaka-project/shaka-player/releases)
- [Changelog](https://github.com/shaka-project/shaka-player/blob/v5.2.12/CHANGELOG.md)
- [Commits](https://github.com/shaka-project/shaka-player/compare/v5.2.4...v5.2.12)

---
updated-dependencies:
- dependency-name: shaka-player
  dependency-version: 5.2.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* test(playback): accept the Shaka 5.2.12 error contract

5.2.12 keeps the public error severities, categories, codes and request
types of 5.2.4, so the version lock moves to v5.2.12 with the same
accepted contract.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: 4gray <fourgray@proton.me>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

docs/architecture/embedded-inline-playback.md

@@ -695,7 +695,7 @@ external-player workflows; it is not copied from the HLS error payload into
 the evidence or technical details. HLS startup development logs are event-only:
 they do not include provider-supplied channel names or source URLs.
 
-Shaka Player `5.2.4` errors cross a separate structured boundary before the
+Shaka Player `5.2.12` errors cross a separate structured boundary before the
 HTML5 or ArtPlayer DASH session emits a diagnostic. Version-locked tests assert
 the installed Shaka version plus the public `Severity`, `Category`, and selected
 online-playback `Code` values used by the boundary. Evidence retains only

docs/architecture/m3u-playlist-module.md

@@ -1513,7 +1513,7 @@ does not change the saved player preference. Clear DASH needs this routing too.
   engine: lazy `import('shaka-player')` on first use (the module is a separate
   lazy chunk, ~217 KB transfer), `drm.clearKeys` configuration, an operation
   queue + generation guard against channel-switch races. The DOM-free Shaka
-  `5.2.4` public-error boundary lives in `libs/playback/util`; it version-locks
+  `5.2.12` public-error boundary lives in `libs/playback/util`; it version-locks
   its allowlisted
   severity/category/code values, emits only structured sanitized
   `PlaybackDiagnosticSource.Shaka` evidence, ignores recoverable error events,