Add deployment scripts and preserve uploads folder

- Add scripts/deploy.sh for safe deployment with uploads preservation
- Add scripts/cleanup_orphan_uploads.php to remove orphaned files
- Add .gitkeep to uploads folder
- Update .gitignore to exclude uploaded files but keep folder structure

The deploy script now:
- Backs up and restores .env file
- Backs up and restores uploads folder contents
- Runs database migrations automatically

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -1,4 +1,9 @@
 .env
 debug.log
 .claude
-settings.local.json
+settings.local.json
+
+# Upload files (keep folder structure, ignore actual uploads)
+uploads/*
+!uploads/.gitkeep
+!uploads/.htaccess