I'm creating an extremely challenging challenge that requires a single regex to accurately match a diverse set of complex patterns using advanced techniques. The text sample includes multiple types of patterns: complex emails (one with escaped quotes and an IPv6 literal domain), international phone numbers with optional extensions and mixed delimiters, dates with non-standard dot separators, reference codes that enforce repetition (backreferences), and a URL with port, path, query string, and fr... (truncated)