fix: request lookup migration

crates/cdk-sqlite/src/mint/migrations/20240703122347_request_lookup_id.sql

@@ -1,5 +1,5 @@
-ALTER TABLE mint_quote ADD request_lookup_id TEXT UNIQUE;
-ALTER TABLE melt_quote ADD request_lookup_id TEXT UNIQUE;
+ALTER TABLE mint_quote ADD COLUMN request_lookup_id TEXT;
+ALTER TABLE melt_quote ADD COLUMN request_lookup_id TEXT;
 
-CREATE INDEX IF NOT EXISTS mint_quote_request_lookup_id_index ON mint_quote(request_lookup_id);
-CREATE INDEX IF NOT EXISTS melt_quote_request_lookup_id_index ON melt_quote(request_lookup_id);
+CREATE UNIQUE INDEX unique_request_lookup_id_mint ON mint_quote(request_lookup_id);
+CREATE UNIQUE INDEX unique_request_lookup_id_melt ON melt_quote(request_lookup_id);