[TASK] add protoc, cleanup

Author: hzb-ps

.github/workflows/pypi-publish.yml

@@ -8,6 +8,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+    - uses: ConorMacBride/install-package@v1
+      with:
+        apt: protobuf-compiler
     - uses: actions/checkout@v4
     - name: Set up Python
       uses: actions/setup-python@v5

.github/workflows/python-package.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: False
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: [ "3.12" ] # ["3.9", "3.10", "3.11", "3.12"]
         numpy-version: [ "numpy<2.0" , "numpy>=2.0" ]
 
     steps: