multiple issues affecting usability, test stability, and performance

[PRAZPC]

1. Critical Bugs & Test Failures

   • Missing Levenshtein dependency causes import errors
   • 8 tests failing due to method naming inconsistencies (camelCase expected)

2. Validation Logic Issues

   • IMEI and port validators produce incorrect results
   • Length validation does not handle all sequence types consistently

3. Performance Bottlenecks

   • Regex patterns compiled repeatedly
   • levenshtein_distance() recalculated each call
   • Naive isPrime() algorithm for large numbers
   • Overall ~20–25% slower execution

Expected Behavior

• Library imports without errors
• All tests pass
• Validators return correct results
• Faster execution and reduced memory usage

Notes

• Fixes include adding missing dependencies, camelCase aliases, universal isLength() method, caching expensive operations, precompiled regex, and optimized prime checking.
• These changes maintain 100% backward compatibility.