feat: update model

backend/database/migrations/20241128075611_init.sql

@@ -87,7 +87,7 @@ CREATE TABLE
         id SERIAL8 PRIMARY KEY,
         media_id INT8 NOT NULL,
         type VARCHAR(128) NOT NULL,
-        source jsonb  default '{}'::jsonb,
+        source text NOT NULL default '',
         size INT8 NOT NULL,
         publish BOOL NOT NULL,
         created_at timestamp NOT NULL default now(),