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/coverart/settings.go

@@ -270,10 +270,9 @@ func enabledSetSignature(enabledIDs map[string]bool) string {
 // unchanged, returns (currentVersion, false, nil) without touching the DB.
 //
 // Used at boot to ensure rows previously settled to 'none' get re-tried
-// once after a provider chain change (e.g. operator updates the binary
-// and a new provider is registered, or one is removed). The version
-// bump triggers eligibility for 'none' rows on the next enrichment pass
-// without requiring a manual operator action.
+// once after a provider chain change (an update registers a new provider,
+// or removes one). The version bump makes 'none' rows eligible on the next
+// enrichment pass with no manual step.
 func (s *SettingsService) BumpVersionIfProvidersChanged(ctx context.Context) (version int32, bumped bool, err error) {
 	hash := registeredProvidersHash()
 	q := dbq.New(s.pool)
@@ -313,7 +312,7 @@ func registeredProvidersHash() string {
 
 // BumpVersion unconditionally increments cover_art_sources_meta.current_version
 // and returns the new value. Used by the manual "Re-search missing art"
-// admin endpoint when the operator wants every 'none' row re-attempted
+// admin endpoint, to re-attempt every 'none' row
 // on the next enrichment pass.
 //
 // Distinct from BumpVersionIfProvidersChanged: that method is the boot-