feat(db): SearchMediaItemsUnifiedRow carries abridged + audio_metadata

The unified search row lagged the table (survey overstated it —
narrators was already there). Both columns come from the
already-scanned media_items side of the joins: EXPLAIN before/after is
plan-identical (same Nested Loop shape, no new scans). Row-completeness
only — no client surface changes; the hand maps select their own keys.

internal/database/queries.sql.go

@@ -12567,6 +12567,8 @@ SELECT
   mi.tags_search,
   mi.contributors_search,
   mi.narrators,
+  mi.abridged,
+  mi.audio_metadata,
   mi.file_sha256,
   mi.opf_identifier,
   mi.opf_uuid,
@@ -12781,6 +12783,8 @@ type SearchMediaItemsUnifiedRow struct {
 	TagsSearch         []string           `db:"tags_search" json:"tags_search"`
 	ContributorsSearch []string           `db:"contributors_search" json:"contributors_search"`
 	Narrators          []string           `db:"narrators" json:"narrators"`
+	Abridged           bool               `db:"abridged" json:"abridged"`
+	AudioMetadata      []byte             `db:"audio_metadata" json:"audio_metadata"`
 	FileSha256         pgtype.Text        `db:"file_sha256" json:"file_sha256"`
 	OpfIdentifier      pgtype.Text        `db:"opf_identifier" json:"opf_identifier"`
 	OpfUuid            pgtype.Text        `db:"opf_uuid" json:"opf_uuid"`
@@ -12858,6 +12862,8 @@ func (q *Queries) SearchMediaItemsUnified(ctx context.Context, arg SearchMediaIt
 			&i.TagsSearch,
 			&i.ContributorsSearch,
 			&i.Narrators,
+			&i.Abridged,
+			&i.AudioMetadata,
 			&i.FileSha256,
 			&i.OpfIdentifier,
 			&i.OpfUuid,

internal/database/queries/queries.sql

@@ -658,6 +658,8 @@ SELECT
   mi.tags_search,
   mi.contributors_search,
   mi.narrators,
+  mi.abridged,
+  mi.audio_metadata,
   mi.file_sha256,
   mi.opf_identifier,
   mi.opf_uuid,