fix(traverse_util): raise ValueError when flatten_dict separator conflicts with keys - #5593
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mayuriphad wants to merge 3 commits into
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mayuriphad wants to merge 3 commits into
mayuriphad wants to merge 3 commits into
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Resolves #5554.
This PR modifies latten_dict to validate that keys are strings and do not contain the separator sep when sep is provided. This prevents silent data corruption when nested structures are restored using unflatten_dict, as well as opaque errors for non-string keys, replacing them with a clear ValueError.
A regression test and docstring update are included.