feat:add candidate apis

backend/prisma/migrations/20260313093706_create_candidate/migration.sql

@@ -0,0 +1,17 @@
+-- CreateTable
+CREATE TABLE "Candidate" (
+    "id" SERIAL NOT NULL,
+    "fullName" TEXT NOT NULL,
+    "mobile" TEXT NOT NULL,
+    "email" TEXT NOT NULL,
+    "subject" TEXT NOT NULL,
+    "coverLetter" TEXT NOT NULL,
+    "careerId" INTEGER NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "Candidate_pkey" PRIMARY KEY ("id")
+);
+
+-- AddForeignKey
+ALTER TABLE "Candidate" ADD CONSTRAINT "Candidate_careerId_fkey" FOREIGN KEY ("careerId") REFERENCES "Career"("id") ON DELETE RESTRICT ON UPDATE CASCADE;