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/acquire/settings.go

@@ -1,6 +1,5 @@
-// Package acquire turns the operator's configured indexers and download
-// clients into working clients (M502 #5518). Ported from Fabled Librarian's
-// internal/acquire.
+// Package acquire turns the configured indexers and download clients into
+// working clients.
 //
 // ONE BUILDER PER KIND. SourceFor makes a search source from a row and
 // DownloadClient makes a download client, path mapping included. The grab,
@@ -60,7 +59,7 @@ type addable struct {
 	perHour   int32
 }
 
-// catalogue is every protocol the operator can add. Exchange starts unpaced
+// catalogue is every protocol an admin can add. Exchange starts unpaced
 // (it searches its own database); the others at 120 searches an hour, which
 // keeps a Prowlarr's indexers under the rate most trackers allow.
 var catalogue = map[string]addable{
@@ -70,7 +69,7 @@ var catalogue = map[string]addable{
 	ProtocolExchange:    {kind: KindDownload, label: "FabledExchange", category: DefaultCategory, timeoutMs: 30000, perHour: 0},
 }
 
-// Addable says whether protocol is one the operator can add.
+// Addable says whether protocol is one an admin can add.
 func Addable(protocol string) bool {
 	_, ok := catalogue[protocol]
 	return ok