CSV Parser: Inadequate handling of parameter columns_required

[sebix]

Leaving the parameter columns_required unset (empty) leads to this error:

2025-12-24 13:41:34,279 - addresslog-parser - ERROR - Bot initialization failed.
Traceback (most recent call last):
  File "/home/sebastianw/dev/intelmq/intelmq/lib/bot.py", line 241, in __init__
    self.init()
    ~~~~~~~~~^^
  File "/home/sebastianw/dev/intelmq/intelmq/bots/parsers/generic/parser_csv.py", line 74, in init
    raise ValueError("Length of parameters 'columns' (%d) and 'columns_required' (%d) "
                     "needs to be equal." % (len(self.columns), len(self.columns_required)))

According to the docs, not setting the parameter should assume that all columns are required.