Convert CSV to JSON with a strict RFC 4180 parser: quoted fields, doubled quotes, delimiters and line breaks inside quotes, mixed CRLF/LF, BOM. Auto-detects comma, semicolon, tab or pipe (or set delimiter). First row becomes object keys; headers:false yields string arrays. Ragged rows and unterminated quotes are repaired and reported in errors[], never a crash. All values stay strings. Send raw CSV text or JSON {csv}. Max 5 MB.