Add bank balances to DB (#3860)

apps/labrinth/migrations/20250628213541_payout-sources-recording.sql

@@ -0,0 +1,8 @@
+-- Add migration script here
+CREATE TABLE payout_sources_balance (
+    account_type TEXT NOT NULL,
+    amount numeric(40, 20) NOT NULL,
+    pending BOOLEAN NOT NULL,
+    recorded timestamptz NOT NULL DEFAULT now(),
+    PRIMARY KEY (recorded, account_type, pending)
+);