Add time to tasks logs

arkindex_tasks/__init__.py

arkindex_tasks/base.py

arkindex_tasks/build_worker_version.py

arkindex_tasks/generate_thumbnails.py

arkindex_tasks/git.py

arkindex_tasks/import_files/transkribus.py

arkindex_tasks/import_git/__main__.py

arkindex_tasks/import_git/base.py

arkindex_tasks/import_git/worker.py

arkindex_tasks/import_iiif/parser.py

arkindex_tasks/import_s3/__main__.py

arkindex_tasks/import_s3/worker.py

arkindex_tasks/init_elements.py

arkindex_tasks/utils.py