Group Dependabot updates into single PRs per ecosystem

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: nicksenap

.github/dependabot.yml

@@ -9,6 +9,10 @@ updates:
     labels:
       - dependencies
     open-pull-requests-limit: 10
+    groups:
+      go-dependencies:
+        patterns:
+          - "*"
 
   - package-ecosystem: github-actions
     directory: /
@@ -19,3 +23,7 @@ updates:
     labels:
       - ci
     open-pull-requests-limit: 5
+    groups:
+      actions:
+        patterns:
+          - "*"