Help Command Fast Path

What: Commands ending with --help now bypass expensive API calls for prefix detection, significantly improving response time.

Details:

• Validates help commands using pattern matching before API calls
• Checks that command ends with --help and contains only valid flags
• Ensures no quotes are present (which would complicate parsing)
• Validates all tokens are alphanumeric or the --help flag
• Immediately returns the full command as its own prefix
• Evidence: New function Yq8() at line 204259; usage at line 204549