fix: update test database connection to use port 9200

- Change default Elasticsearch port from 9201 to 9200 in test-db.ts
- Aligns with simplified Docker configuration using standard ports
- 176 tests now passing (up from 84)

Author: marshallswain

test/test-db.ts

@@ -36,7 +36,7 @@ export function getApiVersion(): string {
 export function getClient(): Client {
   if (!client) {
     client = new Client({
-      node: process.env.ELASTICSEARCH_URL || 'http://localhost:9201',
+      node: process.env.ELASTICSEARCH_URL || 'http://localhost:9200',
     })
   }