ci: allow retrying releases from existing tags

.github/workflows/release.yml

@@ -4,6 +4,12 @@ on:
   push:
     tags:
       - "v*.*.*"
+  workflow_dispatch:
+    inputs:
+      source_ref:
+        description: "Existing release tag to publish (for example v0.1.0)"
+        required: true
+        type: string
 
 permissions:
   contents: write
@@ -20,6 +26,7 @@ jobs:
       - uses: actions/checkout@v4.4.0
         with:
           fetch-depth: 0
+          ref: ${{ github.event_name == 'workflow_dispatch' && inputs.source_ref || github.ref }}
 
       - uses: actions/setup-python@v5.6.0
         with:
@@ -36,12 +43,18 @@ jobs:
         run: |
           package_name="$(node -p 'require("./package.json").name')"
           package_version="$(node -p 'require("./package.json").version')"
-          if [[ "${GITHUB_REF_NAME}" != "v${package_version}" ]]; then
-            echo "Tag ${GITHUB_REF_NAME} does not match package version ${package_version}" >&2
+          release_tag="v${package_version}"
+          requested_ref="${GITHUB_REF_NAME}"
+          if [[ "${GITHUB_EVENT_NAME}" == "workflow_dispatch" ]]; then
+            requested_ref="${{ inputs.source_ref }}"
+          fi
+          if [[ "${requested_ref}" != "${release_tag}" ]]; then
+            echo "Release ref ${requested_ref} does not match package version ${package_version}" >&2
             exit 1
           fi
           echo "name=${package_name}" >> "$GITHUB_OUTPUT"
           echo "version=${package_version}" >> "$GITHUB_OUTPUT"
+          echo "tag=${release_tag}" >> "$GITHUB_OUTPUT"
 
       - name: Install validation dependencies
         run: python3 -m pip install pyyaml==6.0.3
@@ -85,18 +98,19 @@ jobs:
         env:
           GH_TOKEN: ${{ github.token }}
           VERSION: ${{ steps.package.outputs.version }}
+          TAG: ${{ steps.package.outputs.tag }}
         run: |
           release_args=(--title "LoopForge v${VERSION}" --generate-notes)
           if [[ "$VERSION" == *-* ]]; then
             release_args+=(--prerelease)
           fi
-          if gh release view "$GITHUB_REF_NAME" >/dev/null 2>&1; then
-            gh release upload "$GITHUB_REF_NAME" \
+          if gh release view "$TAG" >/dev/null 2>&1; then
+            gh release upload "$TAG" \
               dist/release/loopforge-workflow.tar.gz \
               dist/release/loopforge-workflow.tar.gz.sha256 \
               --clobber
           else
-            gh release create "$GITHUB_REF_NAME" \
+            gh release create "$TAG" \
               dist/release/loopforge-workflow.tar.gz \
               dist/release/loopforge-workflow.tar.gz.sha256 \
               "${release_args[@]}"