fix(db): use bigint for token counter columns in user_stats

Author: waleedlatif1

packages/db/migrations/0181_dazzling_the_leader.sql

@@ -0,0 +1,2 @@
+ALTER TABLE "user_stats" ALTER COLUMN "total_tokens_used" SET DATA TYPE bigint;--> statement-breakpoint
+ALTER TABLE "user_stats" ALTER COLUMN "total_copilot_tokens" SET DATA TYPE bigint;