Update payments table constraints and remove indexes

init.sql

@@ -1,9 +1,6 @@
 CREATE UNLOGGED TABLE payments (
-    correlation_id UUID PRIMARY KEY,
+    correlation_id UUID UNIQUE NOT NULL,
     amount DECIMAL(10, 2) NOT NULL,
     payment_processor VARCHAR(10),
     created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
 );
-
-CREATE INDEX payments_created_at ON payments (created_at );
-CREATE INDEX payments_correlation_id ON payments (correlation_id);