feat: complete remaining Go backend modules

backend/internal/postgres/assets.go

@@ -31,6 +31,10 @@ const GetOwnerAssetSQL = `SELECT ` + assetFields + `
 FROM public.assets AS a
 WHERE a.owner_id = $1::text AND a.id = $2::text
 LIMIT 1`
+const GetOwnerAssetByStoragePathSQL = `SELECT ` + assetFields + `
+FROM public.assets AS a
+WHERE a.owner_id = $1::text AND a.storage_path = $2::text
+LIMIT 1`
 const listPublicAccessibleAssetIDs = `SELECT unnest(j.input_asset_ids || j.output_asset_ids) AS asset_id
     FROM (
       SELECT input_asset_ids, output_asset_ids
@@ -72,6 +76,9 @@ func (db *Database) ListOwner(ctx context.Context, owner string) ([]assets.Asset
 func (db *Database) GetOwner(ctx context.Context, owner, id string) (assets.Asset, bool, error) {
 	return db.oneAsset(ctx, GetOwnerAssetSQL, owner, id)
 }
+func (db *Database) GetOwnerByStoragePath(ctx context.Context, owner, storagePath string) (assets.Asset, bool, error) {
+	return db.oneAsset(ctx, GetOwnerAssetByStoragePathSQL, owner, storagePath)
+}
 func (db *Database) ListPublic(ctx context.Context, owner, client string, limit int) ([]assets.Asset, error) {
 	return db.listAssets(ctx, ListPublicAssetsSQL, owner, assets.ClientTag(client), client, limit)
 }