ci: inline Dependabot CI build (cross-repo reusable workflows unsupported for Dependabot)

Author: ancongui

.github/workflows/dependabot-ci.yml

@@ -2,11 +2,81 @@ name: Dependabot CI
 on:
   pull_request_target:
     branches: [develop, main]
+
+permissions:
+  contents: read
+  packages: read
+  statuses: write
+
 jobs:
   build:
+    runs-on: ubuntu-latest
     if: github.actor == 'dependabot[bot]'
-    uses: fireflyframework/.github/.github/workflows/java-ci.yml@main
-    with:
-      java-version: '25'
-      checkout-ref: ${{ github.event.pull_request.head.sha }}
-      trigger-downstream: false
+    steps:
+      - name: Checkout PR code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+
+      - name: Set up JDK 25
+        uses: actions/setup-java@v4
+        with:
+          java-version: '25'
+          distribution: temurin
+          cache: maven
+
+      - name: Configure GitHub Packages
+        run: |
+          mkdir -p ~/.m2
+          cat > ~/.m2/settings.xml << 'EOF'
+          <settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+                    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                    xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 https://maven.apache.org/xsd/settings-1.0.0.xsd">
+            <servers>
+              <server>
+                <id>github</id>
+                <username>${env.GITHUB_ACTOR}</username>
+                <password>${env.GITHUB_TOKEN}</password>
+              </server>
+            </servers>
+            <profiles>
+              <profile>
+                <id>github-packages</id>
+                <repositories>
+                  <repository>
+                    <id>github</id>
+                    <url>https://maven.pkg.github.com/fireflyframework/fireflyframework-parent</url>
+                    <snapshots><enabled>true</enabled></snapshots>
+                    <releases><enabled>true</enabled></releases>
+                  </repository>
+                </repositories>
+              </profile>
+            </profiles>
+            <activeProfiles>
+              <activeProfile>github-packages</activeProfile>
+            </activeProfiles>
+          </settings>
+          EOF
+
+      - name: Build with Maven
+        run: mvn -B verify
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Report build status
+        if: always()
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          if [ "${{ job.status }}" = "success" ]; then
+            STATE="success"
+            DESC="Dependabot build passed"
+          else
+            STATE="failure"
+            DESC="Dependabot build failed"
+          fi
+          gh api "repos/${{ github.repository }}/statuses/${{ github.event.pull_request.head.sha }}" \
+            -f state="$STATE" \
+            -f context="build / build" \
+            -f description="$DESC" \
+            -f target_url="${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"