release parent separately

.github/workflows/release_parent.yaml

@@ -0,0 +1,31 @@
+name: release_parent
+
+on:
+  workflow_dispatch:
+
+jobs:
+
+  release:
+    runs-on: ubuntu-latest
+    steps:
+
+      - uses: actions/checkout@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+          cache: maven
+          server-id: ossrh
+          server-username: OSSRH_USERNAME
+          server-password: OSSRH_PASSWORD
+          gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}
+          gpg-passphrase: GPG_PASSPHRASE
+
+      - name: release_parent
+        run: mvn -B -U -pl langchain4j-parent -Psign clean deploy
+        env:
+          GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
+          OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+          OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}