Fix serializing issues in planned maintenance

[stveit]

Bugfixes for planned maintenance added in #194 (for #61)

Fixes the ol' Pydantic problem where it struggles with subclasses if you dont specifically mention the subclasses instead of just referencing the parent. Adds some default values as there were some issues reading state back in if something was set to None but didnt have default value, I'm guessing None values arent written to the file.

Also changes how the type field for PMs are defined, as pydantic struggled to recreate the object with the correct subclass if Literal wasnt being used

Does this need a towncrier file?

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	black	78		0	1.27s
✅ PYTHON	isort	78		0	0.29s
✅ PYTHON	ruff	78		0	0.02s

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[github-actions]

Test results

    3 files      3 suites   52s ⏱️
  381 tests   381 ✅ 0 💤 0 ❌
1 143 runs  1 141 ✅ 2 💤 0 ❌

Results for commit 2c18a57.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.99%. Comparing base (bbccc90) to head (2c18a57).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #253   +/-   ##
=======================================
  Coverage   98.99%   98.99%           
=======================================
  Files          50       50           
  Lines        6740     6740           
=======================================
  Hits         6672     6672           
  Misses         68       68           

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[johannaengland]

Does this need a towncrier file?

I think it would be nice, just for the person creating the release to be able to group this and the original PM PR together

[hmpf]

Does this need a towncrier file?

I think it would be nice, just for the person creating the release to be able to group this and the original PM PR together

If there hasn't been a release (as in: on pypi) of the pm functionality then I don't see why there needs to be something grouped together. Then again, I don't see why mentioning PR numbers in the chaneglog are necessary.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud