Add chapters 21-25: Logging, Web Dev, Security, Metaprogramming, Best Practices

[leandro-mana]

Summary

• Chapter 21: Logging and Debugging — loggers, handlers, formatters, hierarchy, traceback, pdb, exception chaining
• Chapter 22: Web Development Fundamentals — HTTP status codes, WSGI protocol, URL routing with decorators, JSON responses, form handling, REST API patterns
• Chapter 23: Security and Cryptography — SHA-256, BLAKE2b, incremental hashing, HMAC authentication, secrets module, constant-time comparison, secure coding practices
• Chapter 24: Metaprogramming — __getattr__/__setattr__, properties, class decorators, __init_subclass__, inspect module (signatures, members, source)
• Chapter 25: Python Ecosystem and Best Practices — PEP 8, docstrings, textwrap, AST parsing, pytest patterns, Protocols for testability, pre-commit, CI/CD, project structure

Each chapter includes 3 Jupyter notebooks, a README, and a comprehensive test file (45 new tests, 225 total).

Test plan

• ruff check . — all checks passed
• ruff format --check . — 55 files already formatted
• mypy . — no issues found in 28 source files
• pytest — 225 tests passed in 0.17s

🤖 Generated with Claude Code