Add: Ethereum address detection to CryptoRecognizer

[kyoungbinkim]

Add Ethereum address detection to CryptoRecognizer

Summary

Extends CryptoRecognizer to detect and validate Ethereum (ETH) addresses using EIP-55 checksum validation.

Ref

• https://github.com/ethereum/ercs/blob/master/ERCS/erc-55.md

Changes

• Added ETH address pattern recognition (0x[a-fA-F0-9]{40})
• Implemented EIP-55 checksum validation using Keccak-256
• Added eth-hash[pycryptodome] dependency
• Added comprehensive test cases for ETH addresses

Testing

• All existing tests pass
• Added 5+ test cases for ETH validation (valid/invalid checksums)

❯ ruff check .
All checks passed!

❯ poetry run pytest tests/test_crypto_recognizer.py
================================ test session starts ================================
platform linux -- Python 3.12.3, pytest-9.0.2, pluggy-1.6.0
rootdir: /home/kbin/workspace/presidio/presidio-analyzer
configfile: pyproject.toml
plugins: anyio-4.12.1, cov-7.0.0, mock-3.15.1
collected 15 items                                                                  

tests/test_crypto_recognizer.py ...............                               [100%]

================================= warnings summary ==================================
../.venv/lib/python3.12/site-packages/torch/jit/_script.py:1480
../.venv/lib/python3.12/site-packages/torch/jit/_script.py:1480
../.venv/lib/python3.12/site-packages/torch/jit/_script.py:1480
../.venv/lib/python3.12/site-packages/torch/jit/_script.py:1480
../.venv/lib/python3.12/site-packages/torch/jit/_script.py:1480
../.venv/lib/python3.12/site-packages/torch/jit/_script.py:1480
../.venv/lib/python3.12/site-packages/torch/jit/_script.py:1480
  /home/kbin/workspace/presidio/.venv/lib/python3.12/site-packages/torch/jit/_script.py:1480: DeprecationWarning: `torch.jit.script` is deprecated. Please switch to `torch.compile` or `torch.export`.
    warnings.warn(

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
========================== 15 passed, 7 warnings in 0.13s ===========================

Checklist

• I have reviewed the contribution guidelines
• I have signed the CLA (if required)
• My code includes unit tests
• All unit tests and lint checks pass locally
• My PR contains documentation updates / additions if required