fix(intelligence): run Arena ELO sync from the live startup path (#3803)

Initializes initArenaEloSync() from instrumentation-node.ts (the Next standalone startup hook) instead of the never-executed server-init.ts, so the Free Provider Rankings page (#3799) actually gets data. On by default; opt out with ARENA_ELO_SYNC_ENABLED=false.

CHANGELOG.md

@@ -53,7 +53,7 @@
 
 ### 📝 Maintenance
 
-- **feat(intelligence): enable Arena ELO sync by default** — the Arena AI leaderboard ELO sync (`ARENA_ELO_SYNC_ENABLED`) that powers the new Free Provider Rankings page ([#3799](https://github.com/diegosouzapw/OmniRoute/pull/3799)) is now **on by default** (was opt-in). It fetches from `api.wulong.dev` on startup (non-blocking, never fatal) and refreshes daily; set `ARENA_ELO_SYNC_ENABLED=false` to opt out of the outbound sync. Without it the rankings page renders empty. (thanks @diegosouzapw)
+- **feat(intelligence): enable Arena ELO sync by default + wire it into the live startup path** — the Arena AI leaderboard ELO sync (`ARENA_ELO_SYNC_ENABLED`) that powers the new Free Provider Rankings page ([#3799](https://github.com/diegosouzapw/OmniRoute/pull/3799)) is now **on by default** (was opt-in). It was also only initialized from `server-init.ts`, which the Next standalone runtime never executes (it boots through `instrumentation-node.ts`), so the sync never actually ran in production — it's now initialized from the live instrumentation path. Fetches from `api.wulong.dev` on startup (non-blocking, never fatal) and refreshes daily; set `ARENA_ELO_SYNC_ENABLED=false` to opt out of the outbound sync. (thanks @diegosouzapw)
 - **chore(quality): Quality Gates → 100%** — completes Fase 6A (systemic hardening: a `stale-allowlist` helper applied across ~10 gates, `docs/architecture/QUALITY_GATES.md`, and ratchet engine v2 with `--require-tighten` + per-metric `eps`) and the entire Fase 7 (20 security/dead-code/mutation/tooling gates), with the Fase 8 plan documented. ([#3757](https://github.com/diegosouzapw/OmniRoute/pull/3757))
 - **docs: close the remaining documentation gaps** for proxy operations, skills internals, the memory engine, RTK customization, and compression extensibility (post-#3438 audit, 5 areas in one PR). ([#3453](https://github.com/diegosouzapw/OmniRoute/pull/3453) — thanks @oyi77)
 - **chore(quality): re-baseline `providerRegistry.ts` file-size** (4692→4703) after #3768's Ollama Cloud `kimi-k2.7-code` capability fix grew the file past the frozen baseline, turning the release's own Fast Quality Gates red. No source file is touched. ([#3770](https://github.com/diegosouzapw/OmniRoute/pull/3770))

src/instrumentation-node.ts

@@ -258,13 +258,25 @@ export async function registerNodejs(): Promise<void> {
     }
 
     try {
-      const { autoRefreshDaemon } = await import(
-        "@omniroute/open-sse/services/autoRefreshDaemon"
-      );
+      const { autoRefreshDaemon } = await import("@omniroute/open-sse/services/autoRefreshDaemon");
       autoRefreshDaemon.start();
     } catch (err: unknown) {
       const msg = err instanceof Error ? err.message : String(err);
       console.warn("[STARTUP] Auto-refresh daemon failed to start (non-fatal):", msg);
     }
+
+    // Arena ELO sync: model intelligence from the Arena AI leaderboard, powering the
+    // Free Provider Rankings page. On by default (opt out with ARENA_ELO_SYNC_ENABLED=false).
+    // Non-blocking — the initial sync is fire-and-forget and never fatal.
+    if (process.env.ARENA_ELO_SYNC_ENABLED !== "false") {
+      try {
+        const { initArenaEloSync } = await import("@/lib/arenaEloSync");
+        await initArenaEloSync();
+        console.log("[STARTUP] Arena ELO sync initialized");
+      } catch (err: unknown) {
+        const msg = err instanceof Error ? err.message : String(err);
+        console.warn("[STARTUP] Arena ELO sync failed to start (non-fatal):", msg);
+      }
+    }
   }
 }

tests/integration/integration-wiring.test.ts

@@ -84,6 +84,14 @@ describe("Pipeline Wiring — instrumentation-node.ts", () => {
     assert.ok(src, "src/instrumentation-node.ts should exist");
     assert.match(src, /seedDefaultModelAliases/);
   });
+
+  it("should initialize Arena ELO sync on the live startup path (on by default, opt-out)", () => {
+    // The Next standalone runtime boots through instrumentation-node, NOT server-init.ts.
+    // The Arena ELO sync (which feeds the Free Provider Rankings page) must be wired here,
+    // or it never runs in production regardless of ARENA_ELO_SYNC_ENABLED.
+    assert.match(src, /initArenaEloSync/);
+    assert.match(src, /ARENA_ELO_SYNC_ENABLED !== "false"/);
+  });
 });
 
 describe("Pipeline Wiring — sse chat handler", () => {