🐛 Enhance release workflow to support manual dispatch and prevent duplicate tags

Author: ChristophShyper

.github/workflows/auto-create-release.yml

@@ -6,14 +6,17 @@ on:
   push:
     branches:
       - release/**
+  workflow_dispatch:
 
 permissions:
   contents: write
   packages: write
 
 jobs:
   release:
-    if: github.event.pull_request.merged == true && startsWith(github.event.pull_request.head.ref, 'release/')
+    if: >-
+      github.event_name == 'workflow_dispatch' ||
+      (github.event.pull_request.merged == true && startsWith(github.event.pull_request.head.ref, 'release/'))
     name: Create Release
     runs-on: ubuntu-24.04-arm
     steps:
@@ -35,8 +38,20 @@ jobs:
         run: |
           task lint
           task git:set-config
-          task version:tag-release
-          echo "REL_VERSION=$(task version:get)" >> "$GITHUB_OUTPUT"
+          REL_VERSION="$(task version:get)"
+          echo "REL_VERSION=${REL_VERSION}" >> "$GITHUB_OUTPUT"
+
+          full_remote_sha="$(git ls-remote --tags origin "refs/tags/${REL_VERSION}" 2>/dev/null | awk '{print $1}' || true)"
+          if [ -n "${full_remote_sha}" ]; then
+            if [ "${GITHUB_EVENT_NAME}" = "workflow_dispatch" ]; then
+              echo "ℹ️ INFO: Full tag '${REL_VERSION}' already exists; skipping tag creation."
+            else
+              echo "❌ ERROR: Full tag '${REL_VERSION}' already exists; aborting" >&2
+              exit 1
+            fi
+          else
+            task version:tag-release
+          fi
 
       - name: Install Docker Buildx
         uses: docker/setup-buildx-action@v3