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/recsettings/songs_like_weights_test.go

@@ -7,10 +7,9 @@ import (
 	"git.fabledsword.com/bvandeusen/minstrel/internal/recommendation"
 )
 
-// The bug, reproduced as a ranking: a track that sounds nothing like the seed
-// but which the user liked and has not played lately used to OUTRANK a perfect
-// similarity match. Operator, 2026-09-10: "I was getting a seeming wide variety
-// of music from each one when I was hoping to stay in a certain neighborhood."
+// A track that sounds nothing like the seed, but which the user liked and has
+// not played lately, must not outrank a perfect similarity match: Songs-like
+// should stay in the seed's neighbourhood.
 //
 // This is the whole point of the songs_like profile, so it is asserted as
 // BEHAVIOUR — two candidates, which one wins — rather than by checking the
@@ -85,7 +84,7 @@ func TestSongsLikeWeights_SimilarityOutrangesEverySeedIndependentTerm(t *testing
 }
 
 // A scope that is seedable but not resettable is the half-wired shape this
-// guards: the profile appears in the admin card, the operator turns a knob,
+// guards: the profile appears in the admin card, an admin turns a knob,
 // and Reset then 404s on a scope the rest of the service knows about.
 func TestShippedWeightsFor_CoversEveryWeightProfile(t *testing.T) {
 	for _, scope := range []string{ScopeRadio, ScopeDailyMix, ScopeSongsLike} {