analyzer: keep only one audio track per language, drop commentary/AD

a release with 2× english (main + director's commentary, or a surround
track plus an audio-description track) was keeping both. the user only
wants one per language. rules, in priority order:

- always drop commentary / audio-description / visually-impaired /
  karaoke / sign-language tracks (matched by title regex + the
  is_hearing_impaired flag)
- within each kept-language group, pick one winner by:
  1. default disposition (main track the muxer chose)
  2. highest channel count
  3. apple-compatible codec (skip a transcode pass)
  4. lowest stream_index for stability

tests cover: commentary dropped even when it matches OG, AD flag
dropped, default beats non-default, higher channels beat default-less
candidates of equal type, Apple-compat tiebreak, per-language dedupe
runs independently, and single-stream files stay noop.

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "netfelix-audio-fix",
-	"version": "2026.04.14.9",
+	"version": "2026.04.14.10",
 	"scripts": {
 		"dev:server": "NODE_ENV=development bun --hot server/index.tsx",
 		"dev:client": "vite",