class FieldConflict(BaseModel):    """One declared pair that came back with two values."""    field: str                 # "date_of_loss"    left: TypedValue           # value, doc_id, page, quoted line    right: TypedValueclass CaseState(BaseModel):    """What a question about a case returns: the whole bundle."""    case_id: str    case_type: str                  # "property damage claim"    present: list[MatchedPiece]     # role, doc_id, match confidence    missing: list[MissingPiece]     # role, why it was due, what it blocks    unmatched: list[str]            # files no role in the list fits    conflicts: list[FieldConflict]  # the declared pairs that disagree    verdict: Literal["complete", "incomplete", "conflicting"]    verdict_reason: str             # one sentence naming what blocks