Add the missing docstrings across the repositoryEvery module, class, function and method that lacked one now carries a docstring,including nested helpers, private functions and the test suite. Test docstringsstate what the test proves rather than the steps it runs.swarm/submission_manifest/__init__.py is left alone: a test asserts it staystext-identical to the backend copy apart from import roots.The change is docstrings only. Stripping every docstring from the tree leaves asyntax tree identical to the parent commit, and the diff has no deleted lines.