fix(dbtest): reset tag-sources settings between tests (#1490)

Add tag_provider_settings to the truncation list and reset
tag_sources_meta.current_version to 1 in ResetDB, mirroring the cover-art
settings reset. Without it the migration-seeded musicbrainz/lastfm rows
leaked across tests and desynced the enabled-set signature, so a key-only
PATCH spuriously reported version_bumped=true
(TestAdminUpdateTagSource_KeyOnlyDoesNotBump).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

internal/dbtest/reset.go

@@ -62,6 +62,10 @@ var dataTables = []string{
 	// (never recreates the singleton, seeded once by 0018); ResetDB
 	// resets its counter via UPDATE below instead.
 	"cover_art_provider_settings",
+	// Same reasoning for the tag-enrichment settings (#1490): truncate the
+	// per-provider rows (reconcile re-seeds registered ones), and reset the
+	// tag_sources_meta counter via UPDATE below rather than truncating it.
+	"tag_provider_settings",
 	// recsettings.New reconciles shipped defaults on every construction
 	// (#1250), so truncating gives each test pristine tuning values.
 	"recommendation_weight_profiles",
@@ -98,4 +102,12 @@ func ResetDB(t *testing.T, pool *pgxpool.Pool) {
 	); err != nil {
 		t.Fatalf("dbtest.ResetDB reset cover-art version: %v", err)
 	}
+	// Same for the tag-sources counter (#1490) — clears cross-test version
+	// accumulation that would spuriously report version_bumped on a
+	// key-only change.
+	if _, err := pool.Exec(ctx,
+		"UPDATE tag_sources_meta SET current_version = 1, last_registered_providers_hash = ''",
+	); err != nil {
+		t.Fatalf("dbtest.ResetDB reset tag-sources version: %v", err)
+	}
 }