feat: Add photoUrl field to User entity for profile photos

Added support for user profile photos:
- Added photo_url TEXT column to users table
- Created migration V008_add_user_photo_url.sql
- Updated User entity with photoUrl field
- Supports base64 data URLs or external URLs
- Indexed for performance

Now users can save profile photos with base64 images.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

maternal-app/maternal-app-backend/src/database/entities/user.entity.ts

@@ -27,6 +27,9 @@ export class User {
   @Column({ length: 100 })
   name: string;
 
+  @Column({ name: 'photo_url', type: 'text', nullable: true })
+  photoUrl?: string | null;
+
   @Column({ length: 10, default: 'en-US' })
   locale: string;
 

maternal-app/maternal-app-backend/src/database/migrations/V008_add_user_photo_url.sql

@@ -0,0 +1,13 @@
+-- Migration: Add photo_url column to users table
+-- Version: V008
+-- Description: Add support for user profile photos (base64 or URL)
+
+-- Add photo_url column to users table
+ALTER TABLE users
+ADD COLUMN IF NOT EXISTS photo_url TEXT;
+
+-- Create index for faster photo lookups
+CREATE INDEX IF NOT EXISTS idx_users_photo_url ON users(photo_url) WHERE photo_url IS NOT NULL;
+
+-- Add comment
+COMMENT ON COLUMN users.photo_url IS 'User profile photo - can be base64 data URL or external URL';