The description field in the main configuration (ad_defaults) is now optional.
Previously, the bot would fail if no description or affixes were provided in
the main configuration. This change addresses issue #435.
Changes:
- Add fallback to empty string ("") when all description prefix/suffix sources
are None in __get_description_with_affixes method
- Add comprehensive test suite for description handling in test_init.py
- Fix coverage path in pyproject.toml from 'kleinanzeigen_bot' to
'src/kleinanzeigen_bot'
New tests cover:
- Description handling without main config description
- New format affixes in configuration
- Mixed old/new format affixes
- Ad-level affix precedence
- None value handling in affixes
- Email address @ symbol replacement
This change maintains backward compatibility while making the description
field optional in the main configuration, improving flexibility for users.
