feat: temporarily disable Snap Store publishing and update README instructions

.github/workflows/release.yml

@@ -41,10 +41,6 @@ on:
         description: "Publish to crates.io"
         type: boolean
         default: false
-      run_snap:
-        description: "Publish to Snap Store (dcrup)"
-        type: boolean
-        default: false
       run_brew:
         description: "Update Homebrew tap"
         type: boolean
@@ -1248,34 +1244,11 @@ jobs:
           git commit -m "dcr ${{ needs.setup.outputs.version }}"
           git push
   
-  # ── Snap Store (dcrup) ─────────────────────────────────────────────────────
-  publish-snap:
-    if: |
-      (github.event_name == 'push' && needs.setup.outputs.prerelease == 'false') ||
-      (github.event_name == 'workflow_dispatch' && github.event.inputs.run_snap == 'true')
-    needs: [setup, build-linux-packages]
-    runs-on: ubuntu-latest
-    steps:
-      - name: Download Built Packages
-        uses: actions/download-artifact@v4
-        with:
-          name: snap-package
-          path: dist-packages
-
-      - name: Resolve Snap File
-        id: snap-file
-        run: |
-          snap_file=$(ls dist-packages/*.snap 2>/dev/null | head -1)
-          if [ -z "$snap_file" ]; then
-            echo "No .snap file found in dist-packages/"
-            exit 1
-          fi
-          echo "snap=$snap_file" >> "$GITHUB_OUTPUT"
-
-      - name: Publish to Snap Store
-        uses: snapcore/action-publish@v1
-        env:
-          SNAPCRAFT_STORE_CREDENTIALS: ${{ secrets.SNAP_STORE_LOGIN }}
-        with:
-          snap: ${{ steps.snap-file.outputs.snap }}
-          release: stable
+  # ── Snap Store (dcrup) — temporarily disabled ────────────────────────────
+  # Classic confinement was denied for this project (too new).
+  # Snap artifact is still built and attached to the release via
+  # publish-dexoron-packages. Users can install manually:
+  #   sudo snap install --classic --dangerous dcrup_*.snap
+  #
+  # publish-snap:
+  #   if: ...