feat: basic stall flow

migrations.py

@@ -18,15 +18,17 @@ async def m001_initial(db):
     """
     Initial stalls table.
     """
+    # user_id, id, wallet, name, currency, zones, meta
     await db.execute(
         """
         CREATE TABLE nostrmarket.stalls (
+            user_id TEXT NOT NULL,
             id TEXT PRIMARY KEY,
             wallet TEXT NOT NULL,
             name TEXT NOT NULL,
             currency TEXT,
-            shipping_zones TEXT NOT NULL,
-            rating REAL DEFAULT 0
+            zones TEXT NOT NULL DEFAULT '[]',
+            meta TEXT NOT NULL DEFAULT '{}'
         );
         """
     )