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/audit/audit.go

@@ -49,25 +49,23 @@ const (
 	ActionForgotPasswordInit   Action = "forgot_password_initiated"
 	ActionPasswordResetByEmail Action = "password_reset_via_email"
 
-	// Active-sessions surface (#370). Worth auditing rather than silent:
-	// revoking sessions is what a user does when they think an account is
-	// compromised, so the audit trail is most useful precisely when it's
-	// exercised.
+	// Revoking sessions is what a user does when they think an account is
+	// compromised, so it is audited: the trail matters most exactly then.
 	ActionSessionRevoke       Action = "session_revoke"
 	ActionSessionRevokeOthers Action = "session_revoke_others"
 
-	// Duplicate merge (#3911). Irreversible: a copy's file and row are removed
+	// Duplicate merge. Irreversible: a copy's file and row are removed
 	// and its history moved onto the copy kept. The metadata names both, so the
 	// log can answer "where did that file go" long after the report is gone.
 	ActionDuplicateMerge Action = "duplicate_merge"
-	// The resolver settling a group without a merge (M498, 2026-10-19):
+	// The resolver settling a group without a merge:
 	// dismissing two versions of a song that are not duplicates, and removing
 	// copies that filled another song's track slot (their tracks are kept,
 	// marked missing, and fetched again).
 	ActionDuplicateDismiss   Action = "duplicate_dismiss"
 	ActionDuplicateWrongFile Action = "duplicate_wrong_file"
 
-	// Subsonic password (#5026): generated in Settings for t/s-only clients.
+	// Subsonic password: generated in Settings for t/s-only clients.
 	ActionSubsonicPasswordSet   Action = "subsonic_password_set"
 	ActionSubsonicPasswordClear Action = "subsonic_password_clear"
 )