fix(playback): update Shaka Player to 5.2.4 (#1411)

docs/architecture/embedded-inline-playback.md

@@ -464,7 +464,7 @@ 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 `5.2.2` errors cross a separate structured boundary before the
+Shaka Player `5.2.4` 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

@@ -1017,7 +1017,7 @@ player in settings.
   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
-  `5.2.2` public-error boundary lives in `libs/playback/util`; it version-locks
+  `5.2.4` 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,