Add data classes for gathering information in issues

[MathiasAlerini]

Is your feature request related to a problem? Please describe.
Issue data model contains several fields which could be gathered in individual data classes.
For example, information regarding uncertainty could be represented by some Uncertainty data model and so on.

Describe the solution you'd like

• Make a DecisionData class
• Make a UncertaintyData class
• Make a ValueMetricData class

class UncertaintyData(DOTModel):
    probability: ProbabilityData | None = None
    key: str = "False"
    source: str = ""


class DecisionData(DOTModel):
    states: list[Literal["Focus", "Tactical", "Strategic"]] | None = None
    decision_type: str | None = None


class ValueMetricData(DOTModel):
    decision_path: 
    expected_result: