feat: add content schema with Drizzle ORM integration

backend/src/database/schemas/content.ts

@@ -0,0 +1,32 @@
+import { pgTable, varchar, timestamp, uuid, pgEnum, index, primaryKey, integer } from 'drizzle-orm/pg-core';
+import { users } from './users';
+import { tags } from './tags';
+
+export const contentType = pgEnum('content_type', ['meme', 'gif']);
+
+export const contents = pgTable('contents', {
+  id: uuid('id').primaryKey().defaultRandom(),
+  userId: uuid('user_id').notNull().references(() => users.uuid, { onDelete: 'cascade' }),
+  type: contentType('type').notNull(),
+  title: varchar('title', { length: 255 }).notNull(),
+  storageKey: varchar('storage_key', { length: 512 }).notNull().unique(), // Clé interne S3
+  mimeType: varchar('mime_type', { length: 128 }).notNull(), // Pour le Content-Type HTTP
+  fileSize: integer('file_size').notNull(), // Taille en octets
+  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+  updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow(),
+  deletedAt: timestamp('deleted_at', { withTimezone: true }), // Soft delete
+}, (table) => ({
+  userIdIdx: index('contents_user_id_idx').on(table.userId),
+  storageKeyIdx: index('contents_storage_key_idx').on(table.storageKey),
+  deletedAtIdx: index('contents_deleted_at_idx').on(table.deletedAt),
+}));
+
+export const contentsToTags = pgTable('contents_to_tags', {
+  contentId: uuid('content_id').notNull().references(() => contents.id, { onDelete: 'cascade' }),
+  tagId: uuid('tag_id').notNull().references(() => tags.id, { onDelete: 'cascade' }),
+}, (t) => ({
+  pk: primaryKey({ columns: [t.contentId, t.tagId] }),
+}));
+
+export type ContentInDb = typeof contents.$inferSelect;
+export type NewContentInDb = typeof contents.$inferInsert;