docs: library comments say what the scanner and resolver do, not how they came to be (#6277)

Rewrites the internal/library comment blocks to rule 32. Task, milestone,
decision and rule ids are gone; the incidents behind them are restated as
the constraint they left (why a file is deleted before its row, why the
missing mark is a mark, why duplicates block on duration). Counts and
album names from one library are dropped from production comments; test
comments keep the names their fixtures use. The tagReadVersion log keeps
each version's before and after, without the measurements.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/library/duplicate_resolve_test.go

@@ -95,8 +95,8 @@ func autoMergeAudit(t *testing.T, pool *pgxpool.Pool, groupID pgtype.UUID) (n in
 }
 
 // One album holding a song twice: the extra copy goes, the copy whose name and
-// tags fit the album stays, and the merge is recorded as the resolver's
-// (M502 #5517): Minstrel is the only program writing the library.
+// tags fit the album stays, and the merge is recorded as the resolver's:
+// Minstrel is the only program writing the library.
 func TestResolveDuplicates_MergesASameReleaseCopy_Integration(t *testing.T) {
 	f := newResolveFixture(t)
 	res, err := ResolveDuplicates(context.Background(), f.pool, nil, "", true)
@@ -193,7 +193,7 @@ func newCrossReleaseRipFixture(t *testing.T) crossReleaseRipFixture {
 }
 
 // A video rip on one release with the clean copy on another: the rip is no
-// release's copy, so it goes and the album cut stays (#5439).
+// release's copy, so it goes and the album cut stays.
 func TestResolveDuplicates_MergesARipAcrossReleases_Integration(t *testing.T) {
 	f := newCrossReleaseRipFixture(t)
 	res, err := ResolveDuplicates(context.Background(), f.pool, nil, "", true)
@@ -212,7 +212,7 @@ func TestResolveDuplicates_MergesARipAcrossReleases_Integration(t *testing.T) {
 }
 
 // Copies on two releases that are both clean each belong to their release:
-// nothing is removed, and they are linked as one song. A rip the operator
+// nothing is removed, and they are linked as one song. A rip an admin
 // marked fine counts as clean.
 func TestResolveDuplicates_KeepsCleanCopiesOnTwoReleases_Integration(t *testing.T) {
 	for name, prepare := range map[string]func(f crossReleaseRipFixture) (string, []any){
@@ -392,8 +392,8 @@ func TestResolveDuplicates_RemovesACopyFromAnotherSongsSlot_Integration(t *testi
 	if err != nil {
 		t.Fatal(err)
 	}
-	// Twelve slots were lost this way on 2026-10-20: folded by that MBID into
-	// the copy kept, and so never wanted back.
+	// Folded by that MBID into the copy kept, the slot would never be wanted
+	// back.
 	if pairs, err := PairMissingTracks(context.Background(), f.pool, nil); err != nil || pairs.Folded() != 0 {
 		t.Fatalf("missing-pair pass = %+v, %v; want the emptied slot left alone", pairs, err)
 	}
@@ -419,9 +419,8 @@ func TestResolveDuplicates_RemovesACopyFromAnotherSongsSlot_Integration(t *testi
 
 // A slot emptied of another song's file folds into a copy of its own song the
 // album already holds (Savant's VOID DLC "Weeper" beside Void's). A copy under
-// the title that is not as long as the song is another song (the emptied "Open
-// the Gateway" folded into a file holding Onward, 2026-10-20): the slot waits
-// for a copy fetched again, and folds into that.
+// the title that is not as long as the song is another song: the slot waits for
+// a copy fetched again, and folds into that.
 func TestResolveDuplicates_EmptiedSlotFoldsOnlyIntoItsOwnSong_Integration(t *testing.T) {
 	for _, tc := range []struct {
 		name       string
@@ -522,7 +521,7 @@ func releaseBlocked(t *testing.T, pool *pgxpool.Pool, hash string) bool {
 }
 
 // AcoustID matched one copy to Tormentor's recording: that copy stays, Record
-// Shop's goes, and the download they came from is set aside (#6169).
+// Shop's goes, and the download they came from is set aside.
 func TestResolveDuplicates_KeepsTheCopyAcoustIDNames_Integration(t *testing.T) {
 	f := seedTrimmedAlbum(t)
 	if _, err := f.pool.Exec(context.Background(),
@@ -551,9 +550,8 @@ func TestResolveDuplicates_KeepsTheCopyAcoustIDNames_Integration(t *testing.T) {
 
 // Copies whose own lookups all name Record Shop's recording are that
 // recording, though their fingerprints differ a little and one is six seconds
-// from Tormentor's length, too near for the lengths to decide (the operator's
-// Wombats and Monday Chill groups, 2026-10-20). With no lookups, copies that
-// far apart are not asked about.
+// from Tormentor's length, too near for the lengths to decide. With no
+// lookups, copies that far apart are not asked about.
 func TestResolveDuplicates_AgreeingLookupsDecideAnAcousticGroup_Integration(t *testing.T) {
 	setup := func(t *testing.T) oneAlbumFixture {
 		f := seedTrimmedAlbum(t)
@@ -706,7 +704,7 @@ func TestResolveDuplicates_LeavesAnUndecidedSlotForTheOperator_Integration(t *te
 	}
 }
 
-// A rip is held back from radio and the mixes; the operator's "fine" sticks
+// A rip is held back from radio and the mixes; an admin's "fine" sticks
 // through later passes; a renamed file is released.
 func TestResolveDuplicates_HoldsBackRips_Integration(t *testing.T) {
 	f := newCrossReleaseRipFixture(t)