[backend] pre-commit cleanup

beat/backend/python/algorithm.py

beat/backend/python/baseformat.py

beat/backend/python/data.py

beat/backend/python/data_loaders.py

beat/backend/python/database.py

beat/backend/python/dataformat.py

beat/backend/python/execution/algorithm.py

beat/backend/python/execution/database.py

beat/backend/python/execution/loop.py

beat/backend/python/execution/messagehandlers.py

beat/backend/python/hash.py

beat/backend/python/inputs.py

beat/backend/python/protocoltemplate.py

beat/backend/python/stats.py

beat/backend/python/utils.py