fix(rectification): share datedPrecision for quarter and range events

Training already counted quarter/range as dated, while the inference ledger mapped them to unknown and left the events unused.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/tests/rectification-v9-contracts.test.ts

@@ -29,6 +29,7 @@ import {
   isEvidenceDomain,
   isEvidenceKind,
   isEvidenceStatus,
+  datedPrecision,
   normalizeQuote,
   quoteIsGroundedInMessage,
 } from "../src/lib/rectification-agentic/v9/evidence-model.ts";
@@ -130,6 +131,10 @@ test("evidence model exposes the full kind/domain/precision/status sets", () =>
     assert.equal(isDatePrecision(precision), true);
   }
   assert.equal(isDatePrecision("exact_minute"), false);
+  assert.equal(datedPrecision("quarter"), "year");
+  assert.equal(datedPrecision("range"), "year");
+  assert.equal(datedPrecision("day"), "day");
+  assert.equal(datedPrecision("unknown"), "unknown");
   for (const status of ["draft", "pending_confirmation", "confirmed", "superseded", "rejected"]) {
     assert.equal(isEvidenceStatus(status), true);
   }