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.

src/routes/apiRoutes.js

@@ -1138,7 +1138,7 @@ const createApiRoutes = (jsonResponse, jsonError, startTime) => {
           size: require("../helpers/cache").getCacheSize(),
           maxSize: 100,
         },
-        endpoints: 36,
+        endpoints: 46,
         providers: ["kiwi", "pewe", "bee", "bonk", "bun", "ally", "nun", "twin", "cog", "moo", "hop", "telli"],
       },
     });
@@ -1198,7 +1198,7 @@ const createApiRoutes = (jsonResponse, jsonError, startTime) => {
           currentSize: require("../helpers/cache").getCacheSize(),
           description: "Map-based cache with TTL expiration and FIFO eviction",
         },
-        endpoints: 36,
+        endpoints: 46,
         timestamp: new Date().toISOString(),
       },
     });