* Only purge unconfigured rss feeds at startup
* Only perform remove obsolete actions if the feed was read
* Update seen_at so downloaded items are not removed while still in the feed
* Increase hardcoded retention to 7 days
* RSS age rule
* Support years (y) and months (mo) and do not approximate durations in seconds
* Better handling of entries with no age
* Formatting
* Allow >=, =>, <=, and =< aliases
* Implement feedback
* Fix existing issue with From SxxEyy in default row
* Test unitless ages
* Match to previous RSS behaviour
* Cleanup logic due to normalisation
* Tests comparing 4.5.5 outcome
* Remove comment - fixed since 4.5.5
* Consistent types for prio, rule, season, and episode
* Rename matching_rule_index
* Fix type warnings
Refactor RSS feed processing logic to enhance clarity and ensure correct precedence for resolved options. Renames functions and variables for better understanding, and inlines feed configuration logic. Adds new tests to verify how category, post-processing, script, and priority settings are applied hierarchically. Also provides a default display for empty RSS log categories.