refactor(store): split into per-aggregate files, unexport pool, remove dead ListBookIDs

backend/internal/store/libraries.go

@@ -0,0 +1,35 @@
+package store
+
+import "context"
+
+func (s *Store) CreateLibrary(ctx context.Context, name, root string) (int64, error) {
+	var id int64
+	err := s.p.QueryRow(ctx,
+		"INSERT INTO libraries (name, root_path) VALUES ($1,$2) RETURNING id", name, root).Scan(&id)
+	return id, err
+}
+
+func (s *Store) ListLibraries(ctx context.Context) ([]Library, error) {
+	rows, err := s.p.Query(ctx, "SELECT id, name, root_path, created_at FROM libraries ORDER BY id")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []Library
+	for rows.Next() {
+		var l Library
+		if err := rows.Scan(&l.ID, &l.Name, &l.RootPath, &l.CreatedAt); err != nil {
+			return nil, err
+		}
+		out = append(out, l)
+	}
+	return out, rows.Err()
+}
+
+func (s *Store) GetLibrary(ctx context.Context, id int64) (Library, error) {
+	var l Library
+	err := s.p.QueryRow(ctx,
+		"SELECT id, name, root_path, created_at FROM libraries WHERE id=$1", id).
+		Scan(&l.ID, &l.Name, &l.RootPath, &l.CreatedAt)
+	return l, err
+}