feat: trigger CD pipeline after image push

Add stage 7 to trigger terraform-docker-openldap pipeline via Gitea API
after successfully pushing a new image to the registry. This enables
automatic deployment of new container versions.

Requires GITEA_TOKEN secret and GITEA_URL variable to be configured.

.gitea/workflows/build.yaml

@@ -273,23 +273,36 @@ jobs:
         if: always()
         run: docker logout ${{ env.REGISTRY }} || true
 
-  # Stage 7: Update CD pipeline (trigger deployment)
+  # Stage 7: Trigger CD pipeline for terraform-docker-openldap
   update-cd:
     runs-on: ubuntu-latest
     needs: push
     if: needs.push.result == 'success'
     steps:
-      - name: Trigger CD pipeline
+      - name: Trigger terraform-docker-openldap pipeline
         run: |
           echo "=============================================="
-          echo "  Ready to update CD pipeline"
+          echo "  Triggering CD pipeline"
           echo "=============================================="
           echo "New version: ${{ needs.push.outputs.version }}"
           echo "Full image:  ${{ needs.push.outputs.full_image }}"
           echo ""
-          echo "TODO: Add step to update version in CD repository"
-          echo "This could be:"
-          echo "  - Update docker-compose.yml in infra repo"
-          echo "  - Update Helm values"
-          echo "  - Trigger ArgoCD sync"
+
+          # Trigger the Gitea Actions workflow via repository dispatch
+          curl -X POST \
+            -H "Authorization: token ${{ secrets.GITEA_TOKEN }}" \
+            -H "Content-Type: application/json" \
+            "${{ vars.GITEA_URL }}/api/v1/repos/wbyc/terraform-docker-openldap/actions/workflows/pipeline.yaml/dispatches" \
+            -d '{
+              "ref": "main",
+              "inputs": {
+                "image_tag": "${{ needs.push.outputs.version }}"
+              }
+            }' || {
+              echo "::warning::Failed to trigger CD pipeline"
+              exit 1
+            }
+
+          echo "=============================================="
+          echo "  CD pipeline triggered successfully"
           echo "=============================================="