feat(prisma): add TestcaseResult model and relations to Submission and Testcase

prisma/schema.prisma

@@ -141,6 +141,8 @@ model Submission {
   user    User    @relation(fields: [userId], references: [id], onDelete: Cascade)
   problem Problem @relation(fields: [problemId], references: [id], onDelete: Cascade)
 
+  TestcaseResult TestcaseResult[]
+
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
 }
@@ -151,16 +153,35 @@ model Testcase {
   problem        Problem          @relation(fields: [problemId], references: [id], onDelete: Cascade)
   data           TestcaseData[]
   expectedOutput String
+  TestcaseResult TestcaseResult[]
 }
 
 model TestcaseData {
   id         String   @id @default(cuid())
+  index      Int
   label      String
   value      String
   testcaseId String
   testcase   Testcase @relation(fields: [testcaseId], references: [id], onDelete: Cascade)
 }
 
+model TestcaseResult {
+  id        String  @id @default(cuid())
+  isCorrect Boolean
+  output    String
+
+  executionTime Int?
+  memoryUsage   Int?
+
+  submissionId String
+  testcaseId   String
+  submission   Submission @relation(fields: [submissionId], references: [id], onDelete: Cascade)
+  testcase     Testcase   @relation(fields: [testcaseId], references: [id], onDelete: Cascade)
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+}
+
 model Account {
   userId            String
   type              String