# Data Quality Checker (cp_026)

## Objective
Build a data quality checker with null, range, uniqueness, and referential integrity rules.

## Language & Library Constraints
- Primary language: python
- Available libraries: fastapi, pydantic, sqlalchemy, requests
- Use library APIs explicitly where suitable in execution contracts.

## Acceptance
- Deterministic taskitems with strict execution contracts.
- Include selected library and preferred APIs when applicable.