feat: Unique calculation id check

[energinet-ajw]

Starting a new calculation with the same ID should not be possible. Now the ID is checked before the calculation is started.

https://app.zenhub.com/workspaces/mandalorian-5fd22a1a59e4740018f5ab5a/issues/gh/energinet-datahub/team-mandalorian/430

Pull-request quality

• [x] The title adheres to this guide
• [x] Tests are written and executed locally
• [ ] Subsystem tests have been tested (by manually deploying to dev_002)

[github-actions[bot]]

Python test results

59 tests   59 :white_check_mark:  12m 36s :stopwatch:  1 suites   0 :zzz:  1 files     0 :x:

Results for commit d797bbf3.

:recycle: This comment has been updated with latest results.