feat: prisma schema User + SyncRun + seed admin

Sets up Prisma 7 with SQLite (better-sqlite3 adapter), User and SyncRun models, migration, and admin seed account for mathieu.fort@gmail.com.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

prisma/seed.ts

@@ -0,0 +1,33 @@
+import { PrismaClient } from '@prisma/client'
+import { PrismaBetterSqlite3 } from '@prisma/adapter-better-sqlite3'
+import { hash } from 'bcryptjs'
+import path from 'path'
+
+const dbUrl = process.env.DATABASE_URL ?? 'file:./data/dev.db'
+const dbPath = dbUrl.startsWith('file:')
+  ? path.resolve(process.cwd(), dbUrl.slice('file:'.length))
+  : dbUrl
+
+const adapter = new PrismaBetterSqlite3({ url: dbPath })
+const prisma = new PrismaClient({ adapter } as any)
+
+async function main() {
+  const password = process.env.SEED_ADMIN_PASSWORD
+  if (!password) throw new Error('SEED_ADMIN_PASSWORD env var requis')
+
+  await prisma.user.upsert({
+    where: { email: 'mathieu.fort@gmail.com' },
+    update: {},
+    create: {
+      email: 'mathieu.fort@gmail.com',
+      name: 'Mathieu',
+      password: await hash(password, 12),
+      role: 'admin',
+    },
+  })
+  console.log('✅ Compte admin créé : mathieu.fort@gmail.com')
+}
+
+main()
+  .catch(console.error)
+  .finally(() => prisma.$disconnect())