Migrate 54 test call sites to construct NormalizedInput{Text: ...}.
Add invariant tests:
- TestNormalizedInputReachesRouteIntact: ingress NormalizedInput reaches Route
- TestTryFastPathReceivesMatchText: TryFastPath gets the same input
- TestMatchTextDoesNotChangeRouting: same Text + different MatchText → same Decision
- TestDecisionUtteranceEqualsInputText: Decision.Utterance == input.Text
Replace nearest-neighbour personal routing with a frozen class-balanced linear head measured on historical, stratified, cross-validation, holdout, and fresh challenge gates (V-702). Close the four repair handoff holes, preserve nested clarification flows, and route Russian possession statements through structural grammar rather than lexical exceptions (V-573). Owner explicitly requested direct commits to master.
claude