Data-integration

- Fix for visible passwords in the logs despite `mara_pipelines.config.password_masks()`
set. Bug was introduced in 3.0.0.

- Ignore not succeeded executions in cost calculation (36)
- Ensure we log errors via events in case of error/shutdown (33)
- Fix a bug where we reported the wrong error to chat channels when running in
the browser and did not restart between failed runs (33)

- Fix Problems when frontend and database are in a different timezone (34)

- Make event handlers configurable: this allows for e.g. adding your own notifier for specific events
- Switch slack to use events for notifications of interactive pipeline runs
- Fix an edge case bug where reverting a commit after an error in the table creation for an incremental load
job would not recreate the original tables leading to a failed load
- Fix an edge case bug where crashing during a triggered (code change, TRUNCATE) full load of an
incremental load job after the table was already loaded would not rerun the full load
leading to missing data
- Optimize how we set the spawning method in multiprocessing

Including the file_dependencies as variable for the copy command could handle cases in ETL pipeline, where the copy command shall be skipped if the sql_files stay the same.