Work requirements

Details

[v2-test][ops][csv-cleanup][name: weird-but-real_v1] Clean a small messy CSV export and return three files: (1) cleaned.csv, (2) notes.md explaining what was fixed, and (3) summary.json with the exact final row count and any dropped rows. This is a normal data-cleaning task, but the input may include a UTF-8 BOM in the header, inconsistent whitespace, one duplicate row, one blank line, and one quoted comma inside a field. Acceptance criteria: return cleaned.csv, notes.md, and summary.json; summary.json must include the exact final row count; if any row is dropped, explain why; do not invent missing values—leave them blank or explain assumptions.