Send messages to monitoring with HTTP4K

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The messages currently sent:

• execution start
• script execution start
• script execution stop
• execution stop

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Unit Test Results

0 files   -   57  0 suites   - 57   0s :stopwatch: -10s 0 tests  - 203  0 :heavy_check_mark:  - 195  0 :zzz: ±0  0 :x:  -   8  0 runs   - 291  0 :heavy_check_mark:  - 195  0 :zzz: ±0  0 :x:  - 96 

Results for commit 4478e59f. ± Comparison against base commit 3a3d7cd7.