fix: Bug fixes from full API diagnostic sweep — all 33 endpoints now 200 OK

- Fix /api/watch 500: correct URL path format (slug/ep-N -> slug/ep-N)
- Fix /api/info: accept both ?id= and ?slug= query params
- Fix /api/status/airing 500: map short status names (ongoing/airing/completed) to correct slugs
- Fix /api/top-rankings: correct selectors (#top-anime .scaff.side.items a.item) + extract rank from rankN class
- Fix /api/completed: correct selectors (section.top-table[data-name='completed'] a.item)
- Fix /api/recently-updated: correct selectors (#recent-update .ani.items .item) + client-side tab filtering
- Fix parseListItem: detect self-as-anchor (<a> elements) + fallback slug extraction
- Fix category extractor: add status name mapping (ongoing->currently-airing, etc.)
- Add /api/cache/stats endpoint for LRU cache diagnostics
- 33 endpoints verified: 0 errors, 0 timeouts

src/extractors/watchPage.extractor.js

@@ -40,7 +40,7 @@ import { fetchWithMirror } from "../helper/mirror.helper.js";
  */
 const extractWatchPage = async (slug, ep) => {
   try {
-    const path = `/watch/${slug}/${ep}`;
+    const path = `/watch/${slug}/ep-${ep}`;
     const { data } = await fetchWithMirror(path);
     const $ = cheerio.load(data);