docs: full sweep — update all files to v2.3.0 with self-healing system

Updated 14 files across the repo to reflect v2.3.0:
- README.md: version badge, 46 endpoints, self-healing section, changelog
- test.js: version 2.3.0
- docs/*: architecture, endpoints, index, streaming — multi-mirror + fallback
- public/*: index.html, docs.html, openapi.json, manifest.json, privacy, tos
- api/proxy.js: updated example comments
- src/routes/apiRoutes.js: endpoint count 36→46

All version refs updated from 2.1.4/2.2.0 → 2.3.0.
Endpoint count updated to 46 (added /pipe-health).
miruro.tv refs updated to multi-domain (miruro.to/ru/bz/tv).
Syntax checks pass on all JS files.

public/tos.html

@@ -58,7 +58,7 @@
     <p>The Service is built and maintained for <strong>educational and learning purposes only</strong>. It demonstrates API design, GraphQL integration, and serverless deployment techniques.</p>
 
     <h2>4. No Affiliation</h2>
-    <p>The Service is <strong>not affiliated with, endorsed by, or connected to</strong> miruro.tv, Miruro, or any of its subsidiaries or affiliates. All trademarks and content belong to their respective owners.</p>
+    <p>The Service is <strong>not affiliated with, endorsed by, or connected to</strong> Miruro or any of its subsidiaries or affiliates across multiple domains (miruro.to, miruro.ru, miruro.bz, miruro.tv). All trademarks and content belong to their respective owners.</p>
 
     <h2>5. Third-Party Content</h2>
     <p>All anime data, images, descriptions, and other content displayed through the API belong to their respective copyright holders (AniList, Miruro). The Service does not host, store, or distribute any copyrighted media.</p>