fix: commit the fixture packages and log that .gitignore was hiding

.gitignore

@@ -757,3 +757,8 @@ FodyWeavers.xsd
 # Additional files built by Visual Studio
 
 # End of https://www.toptal.com/developers/gitignore/api/osx,python,pycharm,windows,visualstudio,visualstudiocode,zsh,jetbrains,jupyternotebooks
+
+# The Visual Studio rules above ignore every packages/ and log/ folder; these hold fixtures that tools/check.py
+# compares byte for byte, so keep them.
+!/fixtures/packages/*
+!/fixtures/records/log/