Ensure local FVYYMM_pruefi_docx_filename_map.toml is reasonably up-to-date

[DeltaDaniel]

When KohlrAHBi is used to parse docx documents for a specific format version (FV), it initially scans the compatible directory in the local edi_energy_mirror repository to create a pruefi to docx filemapping. These files are kept in a cache folder. This speeds up later parsing processes. However, if some files are changed (updated repository or alternating use of real and test repositories) those mappings need to be updated in order to provide reliable results. Therefore, we could either

• provide a --delete-cache flag or
• check for the last date the specific filemapping has been created and update it after a set time (e.g. two weeks)

[hf-kklein]

imho we should make the --delete-cache / bypass cache option the new default. with every update on edi-energy.de we'd have to re-generate the .toml file and re-add it to a new kohlrahbi version. A cache that is outdated by default and needs a new package version to be updated is not a good cache.