Check actual event type and not PmType

[stveit]

Scope and purpose

Fixes a bug where it compares the type of event to a planned maintenance type, which makes no sense. Instead it should check if the event is an instance of the correct event subclass.

This bug luckily did not actually have any impact on the behaviour, since it checks if event.type equals "portstate", which effectively does the same as checking isinstance(event, PortstateEvent), which is why this was not picked up by any tests

Contributor Checklist

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README.

• Added a changelog fragment for towncrier
• Added/amended tests for new/changed code
• Added/changed documentation
• Linted/formatted the code with black, ruff and isort, easiest by using pre-commit
• The first line of the commit message continues the sentence "If applied, this commit will ...", starts with a capital letter, does not end with punctuation and is 50 characters or less long. See https://cbea.ms/git-commit/
• If applicable: Created new issues if this PR does not fix the issue completely/there is further work to be done

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	black	1		0	0.56s
✅ PYTHON	isort	1		0	0.22s
✅ PYTHON	ruff	1		0	0.01s

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[github-actions]

Test results

    3 files      3 suites   1m 18s ⏱️
  547 tests   547 ✅ 0 💤 0 ❌
1 617 runs  1 615 ✅ 2 💤 0 ❌

Results for commit 8e22f76.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.20%. Comparing base (a9a85fb) to head (8e22f76).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #344   +/-   ##
=======================================
  Coverage   98.20%   98.20%           
=======================================
  Files          64       64           
  Lines        7926     7926           
=======================================
  Hits         7783     7783           
  Misses        143      143           

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud