fix: constraint error when deleting channel

packages/db/prisma/migrations/20251218223614_more_stream_key_cascading/migration.sql

@@ -0,0 +1,5 @@
+-- DropForeignKey
+ALTER TABLE "StreamKey" DROP CONSTRAINT "StreamKey_channelId_fkey";
+
+-- AddForeignKey
+ALTER TABLE "StreamKey" ADD CONSTRAINT "StreamKey_channelId_fkey" FOREIGN KEY ("channelId") REFERENCES "Channel"("id") ON DELETE CASCADE ON UPDATE CASCADE;

packages/db/prisma/schema.prisma

@@ -109,7 +109,7 @@ model StreamKey {
   key String @unique
 
   channelId String  @unique
-  channel   Channel @relation(fields: [channelId], references: [id])
+  channel   Channel @relation(fields: [channelId], references: [id], onDelete: Cascade)
 }
 
 model BotAccount {