Group dependabot PRs (#849)

.github/dependabot.yml

@@ -6,6 +6,10 @@ updates:
     schedule:
       interval: "weekly"
     open-pull-requests-limit: 10
+    groups:
+      python-deps:
+        patterns: ["*"]
+        update-types: ["minor", "patch"]
 
   # Frontend npm dependencies
   - package-ecosystem: "npm"
@@ -13,6 +17,10 @@ updates:
     schedule:
       interval: "weekly"
     open-pull-requests-limit: 10
+    groups:
+      npm-deps:
+        patterns: ["*"]
+        update-types: ["minor", "patch"]
 
   # Dockerfile base images
   - package-ecosystem: "docker"
@@ -20,6 +28,9 @@ updates:
     schedule:
       interval: "weekly"
     open-pull-requests-limit: 5
+    groups:
+      docker-images:
+        patterns: ["*"]
 
   # GitHub Actions
   - package-ecosystem: "github-actions"
@@ -27,3 +38,6 @@ updates:
     schedule:
       interval: "weekly"
     open-pull-requests-limit: 5
+    groups:
+      gh-actions:
+        patterns: ["*"]