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/tracks/service.go

@@ -55,13 +55,9 @@ func NewService(pool *pgxpool.Pool, logger *slog.Logger, dataDir string) *Servic
 //     empty (only set if deletedAlbumID is also set).
 //   - err: ErrNotFound, or a failure before anything was deleted. When the
 //     file cannot be removed it is a *library.FileRemoveError and NOTHING was
-//     deleted — see library.DeleteTrackFile for why that order is the contract
-//     (#3918).
+//     deleted — see library.DeleteTrackFile for why that order is the contract.
 //
-// adminID is currently unused — the cascade audit-log line that would
-// reference it isn't wired in this slice. It's threaded through the
-// signature so the upcoming admin_tracks handler doesn't have to
-// re-plumb when audit logging lands.
+// adminID is accepted for the audit log but not yet written to it.
 func (s *Service) RemoveTrack(
 	ctx context.Context,
 	trackID, adminID pgtype.UUID, //nolint:revive // adminID reserved for audit-log wiring in a follow-up