✅ Fixed a bug around season endpoints

[pushrbx]

Fixes #521

• Added a new parameter: continuing -- e.g. /v4/seasons/2024/winter?continuing
• Continuing items from previous seasons are now excluded by default. API consumers are now expected to make a subsequent request to get continuing items in a season from previous seasons. This should be inline with what MAL is doing on their season page (https://myanimelist.net/anime/season/2024/winter)
• did some code cleanup

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 94.11765% with 2 lines in your changes missing coverage. Please review.

Project coverage is 58.04%. Comparing base (7dd9625) to head (cc38196).

Files	Patch %	Lines
app/Features/QueryCurrentAnimeSeasonHandler.php	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #527 +/- ## ============================================ + Coverage 57.76% 58.04% +0.27% Complexity 1352 1352 ============================================ Files 339 339 Lines 5209 5236 +27 ============================================ + Hits 3009 3039 +30 + Misses 2200 2197 -3 ```

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[pushrbx]

There is another bug in the test system, which makes the tests flaky. :tired_face:

[pushrbx]

I've added some seeding based on the job id if the test is being ran in a github action runner. Also I've tweaked the factories:

• end_date -> the generated value should be less than the end date by at least one day.
• scores: padded the generated values with a fraction so they would be less or greater than min/max value.

[pushrbx]

This is still not good. I just tested this, and Kaiju No 8 comes up in the summer season as left over, but it's finishing on the 28th of June.

[pushrbx]

Now it will work reliably. However I've introduced a hard requirement on mongodb version 5 or higher.