Save preprocesing tasks to Enduro DB

[djjuhasz]

Fixes #949.

• Add a local SavePreprocessingTask activity
• Save tasks returned by the preprocessing child workflow to the Enduro DB as PreservationTasks so they are visible in the Dashboard UI

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 52.68817% with 44 lines in your changes missing coverage. Please review.

Project coverage is 51.30%. Comparing base (9307884) to head (90a19a9). Report is 46 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/enums/preprocessing_task_outcome_enum.go	0.00%	31 Missing :warning:
internal/workflow/processing.go	71.42%	7 Missing and 1 partial :warning:
...rnal/workflow/localact/save_preprocessing_tasks.go	87.87%	2 Missing and 2 partials :warning:
cmd/enduro/main.go	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #964 +/- ## ========================================== - Coverage 51.34% 51.30% -0.05% ========================================== Files 102 104 +2 Lines 5679 5768 +89 ========================================== + Hits 2916 2959 +43 - Misses 2520 2562 +42 - Partials 243 247 +4 ```

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