[SWEP-51] Session 테이블 수정 및 마이그레이션 추가

prisma/migrations/20250121060755_session_table_update/migration.sql

@@ -0,0 +1,20 @@
+/*
+  Warnings:
+
+  - You are about to drop the column `user_id` on the `session` table. All the data in the column will be lost.
+  - A unique constraint covering the columns `[sid]` on the table `session` will be added. If there are existing duplicate values, this will fail.
+  - Made the column `expires_at` on table `session` required. This step will fail if there are existing NULL values in that column.
+
+*/
+-- DropForeignKey
+ALTER TABLE `session` DROP FOREIGN KEY `session_user_id_fkey`;
+
+-- DropIndex
+DROP INDEX `session_user_id_fkey` ON `session`;
+
+-- AlterTable
+ALTER TABLE `session` DROP COLUMN `user_id`,
+    MODIFY `expires_at` TIMESTAMP(3) NOT NULL;
+
+-- CreateIndex
+CREATE UNIQUE INDEX `session_sid_key` ON `session`(`sid`);

prisma/schema.prisma

@@ -22,7 +22,6 @@ model User {
   updatedAt DateTime? @db.Timestamp(6) @updatedAt @map("updated_at")
   status Int @db.TinyInt @default(1)
 
-  sessions Session[]
   socialAccounts SocialAccount[]
   notification Notification?
   images Image[]
@@ -62,12 +61,10 @@ model Notification {
 
 model Session {
   id String @id @db.VarChar(255)
-  sid String @db.VarChar(255)
+  sid String @unique @db.VarChar(255)
   data String @db.VarChar(512)
-  expiresAt DateTime? @db.Timestamp(3) @map("expires_at")
+  expiresAt DateTime @db.Timestamp(3) @map("expires_at")
 
-  userId BigInt @map("user_id")
-  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
   @@map("session")
 }