CSV inventory comparison deliverables (review-only).
changed_fields.csv: matched SKU fields with different text values.
missing_skus.csv: SKUs present in only one supplied export.
key_issues.csv: duplicate, blank or ambiguous SKU keys.
all_exceptions.csv: combined findings; audit.json: counts-only summary.
Input files are unchanged. Keys are trimmed and case-insensitive; field values are compared literally.
No fuzzy matching, numeric inference, stock edits or ERP updates.
Ambiguous keys require customer review. Files may contain original cell values; handle privately.
