222e1a28ab
- Widen blind_dump_data bisection range from 0..127 to 0..255 for binary-safe byte extraction, use Encoding::BINARY for chr output - Revert read_from_file to positional param (binary = false) to stay consistent with MSSQL/PostgreSQL implementations - Add elapsed <= 0 guard and .clamp on calibrated benchmark iterations - Add unit specs for blind_detect_length and blind_dump_data covering zero-length, ASCII, long strings, and high bytes (>127) - Fix rubocop: remove leading blank line, use single-quoted strings