[fix] CI: install shapely via pip for version detection

- Add python3-pip and pip install shapely to CI dependencies
- Merge Configure and Build steps into single run block
- Use --break-system-packages for CI environment compatibility

Author: peng.li24

.github/workflows/ci.yml

@@ -17,15 +17,14 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y libgeos-dev
+          sudo apt-get install -y libgeos-dev python3-pip
+          python3 -m pip install --break-system-packages shapely
 
-      - name: Configure
+      - name: Configure and build .deb
         run: |
           mkdir build && cd build
           cmake .. -DCMAKE_BUILD_TYPE=Release
-
-      - name: Build .deb
-        run: make -C build deb
+          make deb
 
   # ---- Release: build .deb and publish on tag -------------------------------
   release:
@@ -38,7 +37,8 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y libgeos-dev
+          sudo apt-get install -y libgeos-dev python3-pip
+          python3 -m pip install --break-system-packages shapely
 
       - name: Build .deb
         run: |