refactor: strip Phase/Plan/R-number references from source comments

packages/navigation/src/infrastructure/repositories/header.repository.span.test.ts

@@ -1,9 +1,12 @@
 import { describe, it, expect } from "vitest";
-import { RecordingTracer, RecordingLogger } from "@repo/core-testing/instrumentation";
+import {
+  RecordingTracer,
+  RecordingLogger,
+} from "@repo/core-testing/instrumentation";
 import { MockHeaderRepository } from "@/infrastructure/repositories/header.repository.mock";
 
-// Mock repo also wraps in spans (R42).
-describe("MockHeaderRepository emits spans (R42)", () => {
+// Mock repo also wraps in spans.
+describe("MockHeaderRepository emits spans", () => {
   it("getHeader emits one span with op='repository'", async () => {
     const tracer = new RecordingTracer();
     const logger = new RecordingLogger();