adding metadata for new repository

otc_metadata/data/services.yaml

@@ -1136,6 +1136,19 @@ services:
     teams:
       - name: docs-database-rw
         permission: write
+  - repositories:
+      - environment: internal
+        repo: docs/distributed-database-middleware
+        type: gitea
+      - environment: public
+        repo: opentelekomcloud-docs/distributed-database-middleware
+        type: github
+    service_category: database
+    service_title: Distributed Database Middleware
+    service_type: ddm
+    teams:
+      - name: docs-database-rw
+        permission: write
   - repositories:
       - environment: internal
         repo: docs/document-database-service