chore: update dependabot.yml to comply with posture checks (#7278)

## Summary

- Changes all 11 dependabot entries from `weekly` to `monthly` schedule
to reduce PR noise
- Removes `day: monday` (only valid for weekly cadence)
- Adds `update-types` split to every entry so breaking major upgrades
arrive in a separate PR from safe minor/patch updates

**Before:** one wildcard group, weekly, major and minor/patch mixed
together
**After:** two groups (`minor-and-patch` / `major`), monthly

## Test plan

- [x] Confirm dependabot picks up the new config (check Insights →
Dependency graph → Dependabot)
- [ ] Verify next scheduled run produces two grouped PRs per ecosystem
(minor+patch bundle, major bundle) rather than one-per-dep

🤖 Generated with [Claude Code](https://claude.com/claude-code)

.github/dependabot.yml

@@ -3,109 +3,186 @@ updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "weekly"
-      day: "monday"
+      interval: "monthly"
     groups:
-      all-dependencies:
+      minor-and-patch:
         patterns:
           - "*"
+        update-types:
+          - "minor"
+          - "patch"
+      major:
+        patterns:
+          - "*"
+        update-types:
+          - "major"
 
   - package-ecosystem: "uv"
     directory: "/libs/checkpoint"
     schedule:
-      interval: "weekly"
-      day: "monday"
+      interval: "monthly"
     groups:
-      all-dependencies:
+      minor-and-patch:
         patterns:
           - "*"
+        update-types:
+          - "minor"
+          - "patch"
+      major:
+        patterns:
+          - "*"
+        update-types:
+          - "major"
+
   - package-ecosystem: "uv"
     directory: "/libs/checkpoint-conformance"
     schedule:
-      interval: "weekly"
-      day: "monday"
+      interval: "monthly"
     groups:
-      all-dependencies:
+      minor-and-patch:
         patterns:
           - "*"
-
+        update-types:
+          - "minor"
+          - "patch"
+      major:
+        patterns:
+          - "*"
+        update-types:
+          - "major"
 
   - package-ecosystem: "uv"
     directory: "/libs/checkpoint-postgres"
     schedule:
-      interval: "weekly"
-      day: "monday"
+      interval: "monthly"
     groups:
-      all-dependencies:
+      minor-and-patch:
         patterns:
           - "*"
+        update-types:
+          - "minor"
+          - "patch"
+      major:
+        patterns:
+          - "*"
+        update-types:
+          - "major"
 
   - package-ecosystem: "uv"
     directory: "/libs/checkpoint-sqlite"
     schedule:
-      interval: "weekly"
-      day: "monday"
+      interval: "monthly"
     groups:
-      all-dependencies:
+      minor-and-patch:
         patterns:
           - "*"
+        update-types:
+          - "minor"
+          - "patch"
+      major:
+        patterns:
+          - "*"
+        update-types:
+          - "major"
 
   - package-ecosystem: "uv"
     directory: "/libs/cli"
     schedule:
-      interval: "weekly"
-      day: "monday"
+      interval: "monthly"
     groups:
-      all-dependencies:
+      minor-and-patch:
         patterns:
           - "*"
+        update-types:
+          - "minor"
+          - "patch"
+      major:
+        patterns:
+          - "*"
+        update-types:
+          - "major"
 
   - package-ecosystem: "uv"
     directory: "/libs/langgraph"
     schedule:
-      interval: "weekly"
-      day: "monday"
+      interval: "monthly"
     groups:
-      all-dependencies:
+      minor-and-patch:
         patterns:
           - "*"
+        update-types:
+          - "minor"
+          - "patch"
+      major:
+        patterns:
+          - "*"
+        update-types:
+          - "major"
 
   - package-ecosystem: "uv"
     directory: "/libs/prebuilt"
     schedule:
-      interval: "weekly"
-      day: "monday"
+      interval: "monthly"
     groups:
-      all-dependencies:
+      minor-and-patch:
         patterns:
           - "*"
+        update-types:
+          - "minor"
+          - "patch"
+      major:
+        patterns:
+          - "*"
+        update-types:
+          - "major"
 
   - package-ecosystem: "uv"
     directory: "/libs/sdk-py"
     schedule:
-      interval: "weekly"
-      day: "monday"
+      interval: "monthly"
     groups:
-      all-dependencies:
+      minor-and-patch:
         patterns:
           - "*"
+        update-types:
+          - "minor"
+          - "patch"
+      major:
+        patterns:
+          - "*"
+        update-types:
+          - "major"
 
   - package-ecosystem: "npm"
     directory: "/libs/cli/js-examples"
     schedule:
-      interval: "weekly"
-      day: "monday"
+      interval: "monthly"
     groups:
-      all-dependencies:
+      minor-and-patch:
         patterns:
           - "*"
+        update-types:
+          - "minor"
+          - "patch"
+      major:
+        patterns:
+          - "*"
+        update-types:
+          - "major"
 
   - package-ecosystem: "npm"
     directory: "/libs/cli/js-monorepo-example"
     schedule:
-      interval: "weekly"
-      day: "monday"
+      interval: "monthly"
     groups:
-      all-dependencies:
+      minor-and-patch:
         patterns:
           - "*"
+        update-types:
+          - "minor"
+          - "patch"
+      major:
+        patterns:
+          - "*"
+        update-types:
+          - "major"