feat(kernel): Add PR packaging and artifact upload for testing

Enable packaging and artifact upload for pull requests to facilitate
testing. Package job generates a zip archive identical to release
artifacts, allowing smoke tests before final releases. Adjusted naming
for zip files to include PR reference or SHA for traceability.

.gitea/workflows/build-kernel.yml

@@ -99,14 +99,14 @@ jobs:
           path: kernel/out
           if-no-files-found: error
 
-  # Release flow only: merges all built modules into one modules/ folder, wraps it
+  # Merge all built modules into one modules/ folder, wrap it in a single
-  # in a single repo-named top folder alongside the helper scripts (selftest.sh,
+  # repo-named top folder alongside the helper scripts (selftest.sh, launch.sh)
-  # launch.sh) and the iecpoc Python frontend (so launch.sh can pip-install it on
+  # and the iecpoc Python frontend (so launch.sh can pip-install it on the Pi),
-  # the Pi), zips it and attaches it to the Gitea release for the pushed tag.
+  # and zip it. Runs on BOTH triggers and uploads the zip as an artifact: on a PR
-  # Skipped entirely on pull requests.
+  # this lets you download and smoke-test the exact archive a release would ship;
-  release:
+  # on a tag the release job below republishes this same artifact unchanged.
+  package:
     needs: build
-    if: startsWith(github.ref, 'refs/tags/')
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
@@ -116,10 +116,20 @@ jobs:
         uses: https://github.com/christopherHX/gitea-download-artifact@v4
         with:
           path: dist
-          # Merge every artifact back into the shared modules/ folder.
+          # Merge every per-kernel artifact back into the shared modules/ folder.
           merge-multiple: true
 
-      - name: Assemble release package
+      - name: Determine version label
+        id: ver
+        run: |
+          # Tags ship under the tag name; PR builds get a traceable pr<n>-<sha>.
+          case "${{ github.ref }}" in
+            refs/tags/*) v="${{ github.ref_name }}" ;;
+            *)           v="pr${{ github.event.pull_request.number }}-$(echo "${{ github.sha }}" | cut -c1-7)" ;;
+          esac
+          echo "ver=$v" >> "$GITHUB_OUTPUT"
+
+      - name: Assemble package zip
         run: |
           repo="${{ github.event.repository.name }}"
           root="package/$repo"
@@ -133,11 +143,32 @@ jobs:
           cp pyproject.toml README.md "$root"/
           cp -r iecpoc "$root"/
           find "$root/iecpoc" -name __pycache__ -type d -prune -exec rm -rf {} +
-          (cd package && zip -r "../${repo}-${{ github.ref_name }}.zip" "$repo")
+          (cd package && zip -r "../${repo}-${{ steps.ver.outputs.ver }}.zip" "$repo")
+
+      - name: Upload package zip
+        uses: https://github.com/christopherHX/gitea-upload-artifact@v4
+        with:
+          name: ${{ github.event.repository.name }}-${{ steps.ver.outputs.ver }}
+          path: ${{ github.event.repository.name }}-*.zip
+          if-no-files-found: error
+
+  # Release flow only: takes the zip the package job already built and attaches it
+  # to the Gitea release for the pushed tag. No re-assembly here. Skipped on PRs.
+  release:
+    needs: package
+    if: startsWith(github.ref, 'refs/tags/')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download package zip
+        uses: https://github.com/christopherHX/gitea-download-artifact@v4
+        with:
+          # The single artifact the package job produced for this tag.
+          name: ${{ github.event.repository.name }}-${{ github.ref_name }}
+          path: dist
 
       - name: Publish to Gitea release
         uses: https://gitea.com/actions/gitea-release-action@v1.3.6
         with:
           api_key: ${{ secrets.GITEA_TOKEN }}
           files: |-
-            *.zip
+            dist/*.zip