ci: upload snapcraft failure logs

Author: zyga

.github/workflows/snap-package.yml

@@ -79,6 +79,14 @@ jobs:
           set -euo pipefail
           snapcraft pack -v
 
+      - name: Upload snapcraft logs on failure
+        if: failure()
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
+        with:
+          name: snapcraft-logs-${{ steps.arch.outputs.ARCH }}
+          path: "~/.local/state/snapcraft/log/snapcraft-*.log"
+          retention-days: 7
+
       - name: Capture snap filename
         id: capture
         run: |