feat: add sessions schema with Drizzle ORM integration

backend/src/database/schemas/sessions.ts

@@ -0,0 +1,18 @@
+import { pgTable, varchar, timestamp, uuid, index, boolean } from 'drizzle-orm/pg-core';
+import { users } from './users';
+
+export const sessions = pgTable('sessions', {
+  id: uuid('id').primaryKey().defaultRandom(),
+  userId: uuid('user_id').notNull().references(() => users.uuid, { onDelete: 'cascade' }),
+  refreshToken: varchar('refresh_token', { length: 512 }).notNull().unique(),
+  userAgent: varchar('user_agent', { length: 255 }),
+  ipHash: varchar('ip_hash', { length: 64 }), // IP hachée pour la protection de la vie privée (RGPD)
+  isValid: boolean('is_valid').notNull().default(true),
+  expiresAt: timestamp('expires_at', { withTimezone: true }).notNull(),
+  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+  updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow(),
+}, (table) => ({
+  userIdIdx: index('sessions_user_id_idx').on(table.userId),
+  refreshTokenIdx: index('sessions_refresh_token_idx').on(table.refreshToken),
+  expiresAtIdx: index('sessions_expires_at_idx').on(table.expiresAt),
+}));