ci: add Gradle dependency submission to build-and-test job

Closes #7

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: coopernetes

.github/workflows/ci.yml

@@ -11,6 +11,8 @@ on:
 jobs:
   build-and-test:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # ratchet:actions/checkout@v6
@@ -24,6 +26,10 @@ jobs:
       - name: Build and test
         run: ./gradlew build
 
+      - name: Submit dependency graph
+        if: github.event_name == 'push'
+        uses: gradle/actions/dependency-submission@48b5f213c81028ace310571dc5ec0fbbca0b2947 # ratchet:gradle/actions/dependency-submission@v4
+
       - name: Publish test results
         if: always()
         uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # ratchet:actions/upload-artifact@v7