Registry: send the changelog, fix the logo, fuller description

The publish workflow passes the version's CHANGELOG.md section to comfy-cli
(COMFY_NODE_CHANGELOG), icon.png is re-rendered from icon.svg at 512x512
with all four corners rounded, and the description covers the features.

.github/workflows/publish.yml

@@ -14,7 +14,30 @@ jobs:
     steps:
       - name: Check out code
         uses: actions/checkout@v7
+      - name: Changelog for this version
+        # comfy-cli sends COMFY_NODE_CHANGELOG as the version's changelog
+        # (the registry's Updates section): the matching CHANGELOG.md section.
+        run: |
+          version=$(sed -n 's/^version = "\(.*\)"/\1/p' pyproject.toml | head -n1)
+          notes=$(awk -v v="$version" '
+            $0 ~ "^## " v "( |$)" { on = 1; next }
+            on && /^## / { exit }
+            on { print }
+          ' CHANGELOG.md | sed -e '/./,$!d')
+          if [ -z "$notes" ]; then
+            echo "::warning::No CHANGELOG.md section for $version"
+            exit 0
+          fi
+          delimiter="EOF_$(date +%s%N)"
+          {
+            echo "COMFY_NODE_CHANGELOG<<$delimiter"
+            printf '%s\n' "$notes"
+            echo "$delimiter"
+          } >> "$GITHUB_ENV"
+          echo "Changelog for $version:"
+          printf '%s\n' "$notes"
       - name: Publish Custom Node
         uses: Comfy-Org/publish-node-action@main
         with:
           personal_access_token: ${{ secrets.REGISTRY_ACCESS_TOKEN }} ## Add your own personal access token to your Github Repository secrets and reference it here.
+          skip_checkout: "true"