Implemented the Sickle Library with respective tests for data postprocessing and error handling. Added general exception handling. Fixed a bug where the success counter is not working.

changed the import of get_config and get_config_path to local imports to resolve circular import issue.

changed the import of get_config and get_config_path to local imports to resolve circular import issue.

Datapipeline registration

See merge request !39

make db name an absolute path

See merge request !40

prefect downloads the code and runs in a temp folder. if we give a working directory relative path to save files,
reading the file after the save would fail since reading code runs in
another temp folder

hifis stats

See merge request !38