Validation upon initialisation of TimeSeries is not strict enough

[veenstrajelmer]

Describe the bug
Initialisation of TimeSeries does not fail when supplying incorrect number of QuantityUnitPairs for the amount of columns.

To Reproduce

from hydrolib.core.io.bc.models import QuantityUnitPair, TimeInterpolation, TimeSeries
steric = TimeSeries(
    name="east2_0001",
    quantityunitpair=[#QuantityUnitPair(quantity="time", unit="seconds since 2022-01-01 00:00:00 +00:00"),
                      QuantityUnitPair(quantity="waterlevel", unit="m")],
    timeinterpolation=TimeInterpolation.linear,
    datablock=[[0, 1.1], [3600, 2.3], [7200, 3.5], [10800, 2.4], [86400, -0.123]],
)

Expected behavior
Since there is only QuantityUnitPair supplied and there are two columns, the initialization of TimeSeries should fail I think.

Screenshots
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Version info (please complete the following information):

• OS: Windows, Anaconda, Spyder
• Version: 0.3.0

Additional context
Add any other context about the problem here.

[veenstrajelmer]

The title might have to be appended with: 'or validation is not carried out upon initialisation'. I realized I am not sure about this. If it is not validated, is it possible to call the validator manually?

[arthurvd]

The validator for this issue might be simple, but the validation while constructing an object in memory will be tricky: when adding a QUPair column, the datablock is temporarily invalid (chicken-egg problem). Relates to #207 which is for reading faulty input, whereas this issue is for constructing (temporarily) faulty input..