Add CI pipeline, tests, sanitizer improvements, and PyPI publishing

[matyas-jirat-keboola]

Summary

• Add CI pipeline with separate lint + test jobs for Python 3.10 and 3.13
• Add PyPI/TestPyPI publishing pipeline triggered on release or manually
• Add comprehensive unit tests (119 tests across recorder, sanitizers, scaffolder, validator)
• Fix namespace package build config for uv_build 0.10.x ([tool.uv.build-backend])
• Add DefaultSanitizer with configurable sensitive fields, headers, and secret values
• Add README and uv lockfile

Test plan

• CI lint job passes (ruff + flake8)
• CI test jobs pass on Python 3.10 and 3.13
• uv build produces a valid wheel locally
• Manual gh workflow run deploy.yml publishes to TestPyPI after merging

🤖 Generated with Claude Code

[soustruh]

LGTM 🙃