docs: server comments say what the code does, not how it came to be (#6277)

Comment blocks in cmd/minstrel and 30 smaller internal packages, rewritten
to rule 32's standard with each citation read in context: task, milestone
and rule ids go, and so do the stories they were attached to ("used to",
"Before #N", measurements from one install, quotes, pointers to Fabled
Librarian's records and to docs/superpowers files that are not in the
repo). Where a story wrapped a real constraint, the constraint stays as a
present-tense fact.

Comments that had gone stale are corrected:
- taste.Config: the tuned values are overlaid by internal/recsettings;
  it is no longer "a later follow-up".
- StorageConfig: the data dir holds art, caches and the stream secret,
  not only playlist covers.
- the Subsonic album list and getUser comments describe what they do
  today rather than a milestone that would change it.

Checked: the non-comment token stream of every changed file matches
HEAD, and gofmt -l is empty.

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

internal/subsonic/star.go

@@ -40,7 +40,7 @@ func (m *mediaHandlers) handleStar(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if trackID.Valid {
-		// Stars the song: every copy of it (M498 #5438).
+		// Stars the song: every copy of it.
 		liked, err := q.LikeTrack(r.Context(), dbq.LikeTrackParams{UserID: user.ID, TrackID: trackID})
 		if err != nil {
 			WriteFail(w, r, ErrGeneric, "Could not star track")
@@ -182,7 +182,7 @@ func (m *mediaHandlers) handleGetStarred2(w http.ResponseWriter, r *http.Request
 // loadStarred fetches the user's full starred set in liked_at DESC order,
 // projects to Subsonic refs (Song / Album / Artist).
 func loadStarred(ctx context.Context, q *dbq.Queries, userID pgtype.UUID) ([]SongRef, []AlbumRef, []ArtistRef, error) {
-	const cap = 500 // bounded for safety; M2 doesn't paginate getStarred
+	const cap = 500 // bounded for safety; getStarred is not paginated
 	songs := []SongRef{}
 	albums := []AlbumRef{}
 	artists := []ArtistRef{}