Add WordPress database backup (561MB) with git-lfs

- Full MySQL dump of wordpress database
- Includes wp_snippets (all API proxies)
- Includes wp_posts, wp_options, wp_postmeta
- Uses git-lfs for large file handling

.gitignore

@@ -14,6 +14,9 @@ error_log
 *.sql
 *.log
 
+# Allow database backup
+!database/*.sql
+
 # OS files
 .DS_Store
 Thumbs.db