Date Reset Bugs

[juftin]

Describe the bug

I suspect weird stuff is happening when months switch over while you're inside a search window.

Here's the scenario:

1. You start a camply search on 1/30/2023 for a flexible time period covering the next week:

   camply --debug campsites \
     --campground 12345 \
     --start-date 2023-01-30 \
     --end-date 2023-02-07 \
     --continuous \
     --search-forever \
     --notifications pushover

2. When the month changes over from January to February, spooky stuff happens. This part I'm not 100% on but I've suspected it for a while. There are some attributes like search_days and search_months that are static instead of dynamic.

I believe we would be better off if search_days and search_months are dynamic based on the datetime at atribute fetch time (@property)