v1.1.0

• Added a per-form XLSX to CSV settings tab that detects every file upload field and exposes, per field: CSV only (drop XLSX), CSV delimiter, and converted worksheet (1 = first sheet)
• Replaced the gf_xlsx_csv_notifications_attach_original, gf_xlsx_csv_notifications_delimiter and gf_xlsx_csv_notifications_sheet_index filters with these UI settings
• Cache filename now accounts for delimiter/worksheet so changing a setting regenerates the CSV instead of reusing a stale one
• Kept the gf_xlsx_csv_notifications_enabled and gf_xlsx_csv_notifications_field_enabled filters as programmatic escape hatches