feat!: derive ccv evidence atrs from outcome strings

[korikuzma]

close #68

• Allow derive_onco_evidence_attributes to accept either a criterion enum or valid ccv evidence outcome string and dervie corresponding evidence line attributes

[Copilot]

Pull request overview

This PR expands CCV 2022 derived-evidence helpers so derive_onco_evidence_attributes can accept either a criterion enum or a full CCV evidence outcome string (including modifiers like _moderate / _not_met) and derive the evidence line attributes accordingly.

Changes:

• Add parsing/validation of CCV outcome strings (including modifier normalization) and derive directionOfEvidenceProvided, strengthOfEvidenceProvided, and scoreOfEvidenceProvided from the parsed outcome.
• Promote the CCV evidence-outcome regex into a shared CCV_CODE_PATTERN constant and reuse it for validation.
• Extend tests to cover adjusted-strength outcomes, modifier normalization, and not_met behavior.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
tests/test_ccv_derived_evidence.py	Adds assertions and new test cases for direction, adjusted strength modifiers, normalization, and not_met.
src/ga4gh/va_spec/ccv_2022/models.py	Extracts CCV outcome regex into CCV_CODE_PATTERN and reuses it in model validation.
src/ga4gh/va_spec/ccv_2022/derived_evidence.py	Implements outcome-string parsing and derives direction/strength/score based on modifiers.
src/ga4gh/va_spec/ccv_2022/init.py	Narrows exports to derive_onco_evidence_attributes (removes map exports).

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[larrybabb]

this looks pretty clean to me. nice job.

[korikuzma]

this looks pretty clean to me. nice job.

Thanks Codex!