Change validator mode to after

[korikuzma]

Describe the bug

Validators fail when values are Pydantic models instead of dicts

Steps to reproduce

onco_evidence_lines.append(
    VariantOncogenicityEvidenceLine(
        directionOfEvidenceProvided=Direction.SUPPORTS,
        strengthOfEvidenceProvided=MappableConcept(
            primaryCoding=Coding(
                code=code(evidence_line_confidence.lower()),
                system=CCV_SYSTEM,
            )
        ),
        evidenceOutcome=MappableConcept(
            primaryCoding=Coding(
                code=code(evidence_code_value["evidence_code"]),
                system=CCV_SYSTEM,
            )
        ),
        scoreOfEvidenceProvided=evidence_line_confidence["score"],
    )
)

Expected behavior

No error

Current behavior

Error is raised

    @staticmethod
    def _validate_evidence_outcome(
        values: dict, system: System, code_pattern: str
    ) -> dict:
        """Validate ``evidenceOutcome`` property if it exists

        :param values: Input values
        :param system: System that should be used for ``primaryCoding.system``
        :param code_pattern: The regex pattern that should be used for
            ``primaryCoding.code``
        :raises ValueError: If ``evidenceOutcome`` exists and is invalid
        :return: Validated input values. If ``evidenceOutcome`` exists, then it will be
            validated and converted to a ``MappableConcept``
        """
        if "evidenceOutcome" in values:
>           mc = MappableConcept(**values["evidenceOutcome"])
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E           TypeError: ga4gh.core.models.MappableConcept() argument after ** must be a mapping, not MappableConcept

Possible reason(s)

No response

Suggested fix

Change validator mode to after since we're just doing validation checks and no pre-processing

Branch, commit, and/or version

version: 0.5.0-a0

Screenshots

No response

Environment details

NA

Additional details

No response

Contribution

Yes, I can create a PR for this fix.