chore(go): use vociferate for unreleased parsing

decorate-pr/action.yml

@@ -147,9 +147,15 @@ runs:
           -H "Content-Type: application/json" \
           "$comments_url" >/dev/null
 
+    - name: Setup Go for vociferate
+      uses: actions/setup-go@v5
+      with:
+        go-version-file: ${{ github.action_path }}/../go.mod
+
     - name: Extract changelog unreleased entries
       id: extract-changelog
       shell: bash
+      working-directory: ${{ github.action_path }}/..
       env:
         CHANGELOG: ${{ inputs.changelog }}
       run: |
@@ -160,24 +166,10 @@ runs:
           exit 0
         fi
 
-        # Extract everything between [Unreleased] header and the next [X.Y.Z] header
-        unreleased="$(awk '
-          /^## \[Unreleased\]/ { in_unreleased=1; next }
-          /^## \[[0-9]+\.[0-9]+\.[0-9]+\]/ { if (in_unreleased) exit }
-          in_unreleased && NF { print }
-        ' "$CHANGELOG")"
-
-        # Use a temporary file to handle multiline content
-        tmp_file=$(mktemp)
-        printf '%s' "$unreleased" > "$tmp_file"
-        
-        # Read it back and set as output
         delimiter="EOF_CHANGELOG"
-        printf '%s<<%s\n' "unreleased_entries<<$delimiter" "$delimiter" >> "$GITHUB_OUTPUT"
-        cat "$tmp_file" >> "$GITHUB_OUTPUT"
+        printf 'unreleased_entries<<%s\n' "$delimiter" >> "$GITHUB_OUTPUT"
+        go run ./cmd/vociferate --print-unreleased --root "$GITHUB_WORKSPACE" --changelog "$CHANGELOG" >> "$GITHUB_OUTPUT"
         printf '%s\n' "$delimiter" >> "$GITHUB_OUTPUT"
-        
-        rm -f "$tmp_file"
 
     - name: Validate changelog gate
       id: changelog-gate