feature: add full parameter names to merge_hardening warnings

previously it was hard to say which parameter was overwritten as the name of the parameter was not propagated. This is now possible and the warning will give you a full path/context of the parameter it is overwriting

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
extended readme with named parameter merging

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>