Keep 3rdparty/ to avoid CLI FileNotFoundError on referenced headers

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: facontidavide

.github/workflows/cmake_ubuntu.yml

@@ -98,12 +98,12 @@ jobs:
 
     - name: Prune directories from Codecov file discovery
       run: |
-        # Remove directories we don't want Codecov to discover as source files.
+        # Remove directories we don't want Codecov to report as source files.
         # Coverage data for these was already stripped by lcov above.
+        # Note: 3rdparty/ is kept because the CLI resolves file references from it.
         rm -rf examples sample_nodes tests tools \
                include/behaviortree_cpp/contrib \
-               include/behaviortree_cpp/flatbuffers \
-               3rdparty
+               include/behaviortree_cpp/flatbuffers
 
     - name: Upload coverage reports to Codecov
       uses: codecov/codecov-action@v5