fix: 3817 dont run task if disabled

[connoratrug]

Closes #3817

What are the main changes you did:

• 'fix' task contractor
• unschedule task if if task row is changed to disabled
• do not schedule tasks that are disabled when loading tasks from database

how to test:

• explain here what to do to test this (or point to unit tests)

todo:

• [ ] updated docs in case of new feature
• [ ] added/updated tests
• [ ] added/updated testplan to include a test for this fix, including ref to bug using # notation

[connoratrug]

Putting disabled=true in a scheduled "hello world" script in the preview still does not stop the script from being executed.

i does for me, could you describe the steps you took to test, maybe my test was wrong( note the 'play' still runs the scrip, the schedular does not )

[sonarcloud[bot]]

Quality Gate failed

Failed conditions
73.5% Coverage on New Code (required ≥ 80%)

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