Sampled values not unique if primary key is numerical

[amontanez24]

Environment Details

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

• SDV version: 1.0.0.dev
• Python version: any
• Operating System: any

Error Description

If the primary key is set to be sdtype numerical, then the values for that key aren't always unique when sampling. The primary key must always have unique values.

Steps to reproduce

test_data = pd.DataFrame(data={
    'primary_key': [0, 1, 2],
    'numerical_col': [1, 2, 3],
    'categorical_col': ['a', 'b', 'a'],
})

test_metadata = SingleTableMetadata()
test_metadata.detect_from_dataframe(test_data)
test_metadata.set_primary_key(column_name='primary_key')

synthesizer = CopulaGANSynthesizer(test_metadata)
synthesizer.fit(test_data)
synthesizer.sample(5)

[amontanez24]

should be solved by #1114