fix(labs): remove BUN aliases from urea, correct DHEA-S molar mass

server/test/normalize.test.ts

@@ -52,4 +52,13 @@ describe("normalizeMarker", () => {
     expect(n.valueNum).toBeCloseTo(0.3);
     expect(n.value).toBe("<0.3");
   });
+  test("BUN is not mapped onto urea (needs N-divisor, not molar mass)", () => {
+    expect(resolveAnalyte("BUN")).toBeNull();
+    expect(resolveAnalyte("blood urea nitrogen")).toBeNull();
+    expect(resolveAnalyte("urea")?.key).toBe("urea");
+  });
+  test("DHEA-S µg/dL converts with corrected molar mass", () => {
+    const n = normalizeMarker({ name: "DHEA-S", value: "250", unit: "ug/dL" });
+    expect(n.valueCanonical).toBeCloseTo(6.78, 1); // 250 * 0.02713
+  });
 });