update codecov

Author: SergeyMakeev

.github/workflows/coverage.yml

@@ -50,12 +50,12 @@ jobs:
       - name: Generate Coverage Report
         run: |
           lcov --directory build --capture --output-file coverage.info
-          # Remove coverage from test files and external dependencies
-          lcov --remove coverage.info '*/SlotMapTest*.cpp' --output-file coverage_filtered.info
-          lcov --remove coverage_filtered.info '*/extern/*' --output-file coverage_filtered.info
+          # Remove coverage from external dependencies only
+          lcov --remove coverage.info '*/extern/*' --output-file coverage_filtered.info
           lcov --remove coverage_filtered.info '*/googletest/*' --output-file coverage_filtered.info
-          # Extract only slot_map header coverage
-          lcov --extract coverage_filtered.info '*/slot_map/slot_map.h' --output-file coverage_final.info
+          lcov --remove coverage_filtered.info '*/CMakeFiles/*' --output-file coverage_filtered.info
+          # Keep both header and test files that exercise slot_map
+          lcov --extract coverage_filtered.info '*/slot_map/*' '*/SlotMapTest*.cpp' --output-file coverage_final.info
           lcov --list coverage_final.info
           echo "=== Coverage file contents ==="
           cat coverage_final.info