feat: the library's albums go on the wanted list as held, once; after that the list is the truth (M502 #5567)

A one-time job in the wanted worker lists every album in the library as a
held want, one per release group, with a record that it happened
(acquisition_settings.library_listed_at). Albums whose tags name only a
release are named on MusicBrainz first, 120 a pass; what nothing names is
counted and shown on the Held tab.

Re-acquisition now wants back only albums on the list. Taking a held album
off the list leaves its files, and it is never fetched back; albums put in
the library folder by hand afterwards are not added.

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

internal/db/dbq/search.sql.go

@@ -96,7 +96,7 @@ func (q *Queries) EndGrab(ctx context.Context, arg EndGrabParams) error {
 
 const getAcquisitionSettings = `-- name: GetAcquisitionSettings :one
 
-SELECT id, auto_grab, search_interval_hours, allowed_qualities, last_pass_at, last_pass, updated_at, import_root, seed_ratio, seed_days, stall_hours FROM acquisition_settings WHERE id = true
+SELECT id, auto_grab, search_interval_hours, allowed_qualities, last_pass_at, last_pass, updated_at, import_root, seed_ratio, seed_days, stall_hours, library_listing_started_at, library_listed_at, library_unlisted FROM acquisition_settings WHERE id = true
 `
 
 // Searching for wants and grabbing releases (M502 #5521).
@@ -115,6 +115,9 @@ func (q *Queries) GetAcquisitionSettings(ctx context.Context) (AcquisitionSettin
 		&i.SeedRatio,
 		&i.SeedDays,
 		&i.StallHours,
+		&i.LibraryListingStartedAt,
+		&i.LibraryListedAt,
+		&i.LibraryUnlisted,
 	)
 	return i, err
 }
@@ -608,7 +611,7 @@ UPDATE acquisition_settings
        stall_hours           = $7,
        updated_at            = now()
  WHERE id = true
-RETURNING id, auto_grab, search_interval_hours, allowed_qualities, last_pass_at, last_pass, updated_at, import_root, seed_ratio, seed_days, stall_hours
+RETURNING id, auto_grab, search_interval_hours, allowed_qualities, last_pass_at, last_pass, updated_at, import_root, seed_ratio, seed_days, stall_hours, library_listing_started_at, library_listed_at, library_unlisted
 `
 
 type UpdateAcquisitionSettingsParams struct {
@@ -644,6 +647,9 @@ func (q *Queries) UpdateAcquisitionSettings(ctx context.Context, arg UpdateAcqui
 		&i.SeedRatio,
 		&i.SeedDays,
 		&i.StallHours,
+		&i.LibraryListingStartedAt,
+		&i.LibraryListedAt,
+		&i.LibraryUnlisted,
 	)
 	return i, err
 }