KeyUniqueness metric should only be applied to primary and alternate keys

[frances-h]

Environment Details

Please indicate the following details about the environment in which you found the bug:

• SDMetrics version: diagnostic_report_updates
• Python version:
• Operating System:

Error Description

In the DataValidity property, the KeyUniqueness metric is currently being applied to foreign key columns. The KeyUniqueness metric should only be applied to primary keys and alternate keys.

Steps to reproduce

from sdmetrics.demos import load_demo
from sdmetrics.reports.multi_table import DiagnosticReport

real_data, synthetic_data, metadata = load_demo(modality='multi_table')
report = DiagnosticReport()

report.generate(real_data, synthetic_data, metadata)
report.get_details('Data Validity')