polish-pit-calculator

Implement and refactor Polish PIT tax reporters and related parsing/aggregation logic. Use when adding or modifying reporters in polish_pit_calculator/tax_reporters/, normalizing broker exports, adjusting exchange-rate usage/caching, or updating tests to assert full report outputs.

Create or update agent instructions and local skills for this repository. Use when asked to modify AGENTS.md, add or refine skills under skills/, audit README/CHANGELOG/SECURITY/CONTRIBUTING/pyproject.toml for stale guidance, or perform no-secrets documentation hygiene checks.