AnnotatedFloatScheme created empty Flags

Summary

Initializing SaQC with AnnotatedFloatScheme results in empty Flags.

Reproducible Example

import numpy as np
import pandas as pd
from saqc import SaQC, AnnotatedFloatScheme

data = pd.DataFrame(np.arange(10), index=pd.date_range("2024-01-01", freq="D", periods=10), columns=["data"])
qc = SaQC(data, scheme=AnnotatedFloatScheme())
qc.flags

What is the current bug behavior?

qc.flags returns 'Empty DictOfSeries'.

What is the expected correct behavior?

A DictOfSeries with one column and filled with -np.inf.

Stacktrace

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Possible fixes

(If you can, link to the line of code that might be responsible for the problem)