fix(tooling): include namespace packages in coverage reports

Author: danceratopz

pyproject.toml

@@ -303,6 +303,12 @@ omit = [
     "*/ethereum/forks/bpo*/*",
 ]
 
+[tool.coverage.report]
+# `ethereum.forks` is a namespace package (no `__init__.py`); without this
+# option, coverage skips it when reporting never-imported files at 0%, so
+# forks absent from a run silently drop out of the coverage denominator.
+include_namespace_packages = true
+
 [tool.docc]
 context = [
     "docc.listing.context",