fix: blocklist-search queue ID type mismatch and bump version to 1.7.16

- Cast arrQueueId to String in both sides of the download lookup comparison
  in /api/dashboard/blocklist-search to resolve false-negative match failure
  caused by DOM dataset string vs Radarr/Sonarr API number type mismatch
- Add regression integration test for string-vs-number arrQueueId matching
- Bump version to 1.7.16, update CHANGELOG.md, openapi.yaml, and JSDoc examples

Resolves #48

server/index.js

@@ -249,7 +249,7 @@ app.use(express.json({ limit: '64kb' })); // prevent oversized JSON payloads
  *                 version:
  *                   type: string
  *                   description: sofarr version
- *                   example: "1.7.14"
+ *                   example: "1.7.16"
  */
 app.get('/health', (req, res) => {
   res.json({ status: 'ok', uptime: process.uptime(), version });