fix: use bigint for amounts in postgres (#1030)

lnbits/extensions/lnurlpayout/migrations.py

@@ -3,14 +3,14 @@ async def m001_initial(db):
     Initial lnurlpayouts table.
     """
     await db.execute(
-        """
+        f"""
         CREATE TABLE lnurlpayout.lnurlpayouts (
             id TEXT PRIMARY KEY,
             title TEXT NOT NULL,
             wallet TEXT NOT NULL,
             admin_key TEXT NOT NULL,
             lnurlpay TEXT NOT NULL,
-            threshold INT NOT NULL
+            threshold {db.big_int} NOT NULL
         );
     """
     )