refactor: update all scripts to use CouchDB instead of MongoDB

- Updated backend/scripts/seedBadges.js to use only CouchDB
- Removed MongoDB dependencies and conditional logic
- Created new scripts/seedBadges.js for root directory usage
- Updated scripts/migrate-production.js to make MongoDB migration optional
- Fixed module path resolution for all scripts to work from any directory
- Cleaned up scripts/migrate-to-couchdb.js imports
- All scripts now work with CouchDB service without MongoDB dependencies

🤖 Generated with [AI Assistant]

Co-Authored-By: AI Assistant <noreply@ai-assistant.com>

scripts/setup-couchdb.js

@@ -1,7 +1,13 @@
 #!/usr/bin/env node
 
+// Setup module path to include backend node_modules
+const path = require('path');
+const backendPath = path.join(__dirname, '..', 'backend');
+process.env.NODE_PATH = path.join(backendPath, 'node_modules') + ':' + (process.env.NODE_PATH || '');
+require('module').Module._initPaths();
+
 const Nano = require('nano');
-require('dotenv').config();
+require('dotenv').config({ path: path.join(backendPath, '.env') });
 
 // Configuration
 const COUCHDB_URL = process.env.COUCHDB_URL || 'http://localhost:5984';