fix(freehire-search): keep the salary period so a yearly figure isn't read as monthly (#504)

formatSalary printed only the currency and amounts, although freehire's
enrichment records the pay period. `detail software-developer-trainee-codifi-fra635ux`
printed `INR 300000–300000` while the API returns `salary_period: "year"`
for that posting, so a yearly salary screened against a monthly figure
read as twelve times its real monthly value.

Append the period when freehire records one (`INR 300000–300000/year`,
`INR 12000/month`); a record without a period prints exactly as before.
Two new parsing.test.ts cases pin it; both fail on the old formatter.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

.agents/skills/freehire-search/cli/tests/parsing.test.ts

@@ -68,6 +68,18 @@ describe("toDetail — adds cleaned description + enrichment", () => {
     expect(d.salary).toBe("EUR 90000–120000");
   });
 
+  test("keeps the salary period, so a yearly figure is not read as monthly", () => {
+    const d = toDetail(
+      job({ enrichment: { salary_min: 300000, salary_max: 300000, salary_currency: "INR", salary_period: "year" } }),
+    );
+    expect(d.salary).toBe("INR 300000–300000/year");
+  });
+
+  test("a single-bound salary keeps its period too", () => {
+    const d = toDetail(job({ enrichment: { salary_min: 12000, salary_currency: "INR", salary_period: "month" } }));
+    expect(d.salary).toBe("INR 12000/month");
+  });
+
   test("null enrichment fields when the enrichment object is empty", () => {
     const d = toDetail(job({ enrichment: {} }));
     expect(d.seniority).toBeNull();