Ryan Malloy
9ba17ef621
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Critical fixes: - C1: Preserve existing PNG text metadata when embedding YAML - C2: Exception handling — metadata failure no longer crashes parse() - C3: Atomic write via tempfile+rename prevents corruption Important fixes: - I1: Size guard (10MB) on read_yaml_from_png for untrusted PNGs - I2: Existence check and meaningful errors in read_yaml_from_png - I3: ParsedInput NamedTuple replaces raw 3-tuple return - I4: Normalize output_formats to tuple to prevent substring matching - I5: 19-test suite covering round-trip, edge cases, and error paths Also: removed dead prepend_input parameter (S3), added version tag (S1).