Redis-style glob pattern matching used by KEYS and SCAN ... MATCH.

Supports the pattern syntax documented for Redis KEYS:

• * – matches any number of characters (including zero)
• ? – matches exactly one character
• [aeiou] – matches a single character from the set
• [^aeiou] – matches a single character not in the set
• [a-z] – character ranges inside a class
• \ – escapes the next pattern character so it is matched literally

Matching is byte-oriented, consistent with Redis key comparison.