fix: restore ninja -v flag for compile command visibility

Removed in b24e4647b under naive assumption we were "past debugging phase".

Reality: debugging is never done, verbose output is invaluable, costs nothing.
Keep -v flag permanently.

.github/actions/xahau-ga-build/action.yml

@@ -208,7 +208,7 @@ runs:
       shell: bash
       run: |
         cd ${{ inputs.build_dir }}
-        cmake --build . --config ${{ inputs.configuration }} --parallel $(nproc)
+        cmake --build . --config ${{ inputs.configuration }} --parallel $(nproc) -- -v
 
     - name: Show ccache statistics
       if: inputs.ccache_enabled == 'true'