chore: update Python versions and add linters (v0.4.3)

[bug-ops]

Summary

• Remove Python 3.9 support (dependencies require 3.10+)
• Add Python 3.14 support
• Add ruff linter and formatter for Python bindings
• Add biome linter and formatter for Node.js bindings
• Add npm audit to CI security checks
• Bump version to 0.4.3

Changes

Python version support

• Update CI matrix to test Python 3.10-3.14 on Linux, 3.14 only on macOS/Windows
• Update release workflow to build wheels for all supported Python versions (3.10-3.14)
• Update pyproject.toml requires-python to >=3.10

Linting infrastructure

• Add ruff configuration to pyproject.toml
• Add biome configuration to Node.js bindings
• Split lint-bindings job into parallel lint-python and lint-node jobs
• Make lint jobs prerequisites for test and coverage jobs
• Use official GitHub Actions: astral-sh/ruff-action@v3, biomejs/setup-biome@v2

Security

• Add pnpm audit to security job alongside cargo deny

Documentation

• Update README, CONTRIBUTING with new Python version requirements

Test plan

• CI workflow updated with correct Python matrix
• Release workflow builds wheels for 3.10-3.14
• ruff check and ruff format pass on Python bindings
• biome check passes on Node.js bindings
• All tests pass
• Documentation updated

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@           Coverage Diff           @@
##             main      #47   +/-   ##
=======================================
  Coverage   91.68%   91.68%           
=======================================
  Files          34       34           
  Lines        7816     7816           
=======================================
  Hits         7166     7166           
  Misses        650      650           

Flag	Coverage Δ
rust-core	91.68% <ø> (ø)

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