fix: preserve CSV whitespace and CR records

[rogerchappel]

Summary

• preserve leading and trailing whitespace in unquoted CSV fields and through toCsv round trips
• accept CR-only record separators while retaining CR, LF, and CRLF inside quoted multiline fields
• quote carriage-return values during serialization and retain stable unterminated-record diagnostics

Commits

• bcd9057 test: cover CSV record and whitespace compatibility
• 4f67f9f fix: preserve CSV whitespace and CR records

Verification

• npm ci
• npm run release:check (47/47 tests, syntax, CLI smoke, documentation install smoke, package dry-run)
• git diff --check origin/main...HEAD

All commits are authored and committed by Roger Chappel miscanalysis@gmail.com.

[rogerchappel]

Automated merge note

Triage class: auto-merge

Summary: Preserves unquoted CSV field edge whitespace, accepts CR-only records, retains embedded CR/LF/CRLF in quoted fields, and quotes CR values; includes focused regression coverage (2 files, +38/-6).

Checks run: GitHub CI Repository hygiene completed SUCCESS; worker verification npm ci, npm run release:check (47/47 tests, syntax, CLI smoke, documentation install smoke, package dry-run), and git diff --check origin/main...HEAD passed. Full diff and commit identities reviewed.

Rebased/CI-repaired: No.

Verified head SHA: 4f67f9f91943fb88ab7f374e5d41801341cd5b26.