[Copilot]

MSMetaEnhancer needs to support metabolomics workflows using mzTab-M. The new backend exposes small-molecule records for metadata enhancement.

• Parsing and integration: Add MzTabM, reading SMH/SML rows and mapping chemical formula, name, and InChIKey fields to MSMetaEnhancer metadata keys. Route mzTab-M file formats through Application.
• Round-trip: Fuse annotations back into the document; write new fields as optional columns while preserving row widths.

app = Application()
app.load_data("sample.mztab", file_format="mztab-m")
metadata = app.data.get_metadata()

• Fixes Support for mztab-m #168