fix(tests): increase timeout for facebook path-salience effect-size test

The effect-size test runs 3 trials of path ranking on the Facebook
graph (4039 nodes), which exceeds 60s on CI runners. Increase to 120s.

Author: Mearman

src/experiments/evaluation/__tests__/validation/primary/ranking/path-salience/benchmarks/facebook.exp.integration.test.ts

@@ -158,7 +158,7 @@ describe("Path Salience Ranking: Benchmarks - Facebook", () => {
 	 * Measures Cohen's d effect size for path diversity
 	 * between Path Salience Ranking and random baseline.
 	 */
-	it("should show effect size against random baseline", { timeout: 60_000 }, async () => {
+	it("should show effect size against random baseline", { timeout: 120_000 }, async () => {
 		const benchmark = await loadBenchmarkByIdFromUrl("facebook");
 		const graph = benchmark.graph;