Release v16.0.0

2026/10/24 Version 16.0.0

• BREAKING: Use the Self type introduced in Python 3.11
• Error handling improvements
  • 🤖 Avoid logging callback failures when queued executor handlers are canceled
• Documentation improvements
  • 🤖 Add Args, Returns and Raises sections to public docstrings (#221)
  • 🤖 AGENTS.md file for AI coding assistant guidance
• Local development changes
  • Type check with both pyright and mypy by default
  • Remove tox test matrix, leaning on Github Actions