fix(js): bump pprl multi-level test timeout + bump to v0.3.1 (#49)

The standard/high/paranoid PPRL end-to-end test (~3.9s on developer
laptop) occasionally times out under CI concurrent load at the default
5000ms budget. Bump the per-test timeout to 15000ms; no behavior change.

v0.3.0 publish-npm workflow failed on this flake (run 24472319544).
Re-tag as v0.3.1 to trigger a clean publish.

Author: benzsevern

packages/goldenmatch-js/package.json

@@ -1,6 +1,6 @@
 {
   "name": "goldenmatch",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "description": "Entity resolution toolkit — deduplicate, match, and create golden records",
   "type": "module",
   "exports": {

packages/goldenmatch-js/tests/unit/pprl-protocol.test.ts

@@ -199,7 +199,7 @@ describe("runPPRL", () => {
     expect(hits).toBeGreaterThanOrEqual(7);
   });
 
-  it("runs end-to-end with security_level standard/high/paranoid and finds same true pairs", () => {
+  it("runs end-to-end with security_level standard/high/paranoid and finds same true pairs", { timeout: 15000 }, () => {
     const { a, b } = twoPartiesWithOverlap();
     const baseFields: string[] = ["first_name", "last_name", "email"];