add migrations

server/prisma/migrations/20251009120427_lucia/migration.sql

@@ -0,0 +1,7 @@
+-- CreateTable
+CREATE TABLE "Session" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "userId" TEXT NOT NULL,
+    "expiresAt" DATETIME NOT NULL,
+    CONSTRAINT "Session_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User" ("id") ON DELETE CASCADE ON UPDATE CASCADE
+);