Add image CRUD endpoints, seed the DB, and update Prisma

[hussein-m-kandil]

This pull request adds full image management support to the blog API, improves test reliability, and updates Prisma dependencies.

What’s New

• 🖼️ Added image upload: POST /api/v1/images
• 📥 Added endpoints to get one or many images
• 📝 Added update endpoint: PATCH /api/v1/images/:id
• ❌ Added delete endpoint: DELETE /api/v1/images/:id
• 🔁 Images can now be attached when creating or updating posts
• 🧠 Extracted image metadata using Sharp on upload

Enhancements

• 🧱 Added and migrated Image model in Prisma
• 🔐 Omitted sensitive image fields globally from API responses
• 🧼 Added types for image handling
• 🌱 Seeded database with sample users and posts
• 🧪 Re-enabled test isolation for reliable test runs
• 📦 Updated prisma and @prisma/client