fix(services): считать failover по IP Health а не по строке ноды

Панель брала service_nodes, которую затирал group apply.
Теперь тот же binding ip_health, что таблица активов; group не пишет в ноду.

Co-authored-by: Cursor <[email protected]>

apps/api/test/health-check.test.ts

@@ -291,6 +291,77 @@ describe("health-check state derivation via runAllChecks", () => {
     expect(targets[0]?.ip).toBe("2.59.161.102");
     expect(targets[0]?.hostname).toBe("s.rkns.top");
   });
+
+  it("does not mark node unhealthy when binding majority is OK and group local fails", async () => {
+    const { createMemoryDb, repos, runMigrations } = await import("@cfdm/db");
+    const { db, sqlite } = createMemoryDb();
+    runMigrations(sqlite);
+
+    const tcp = await startTcpServer();
+    try {
+      const domain = repos.createDomain(db, null, "example.com", "zone-id");
+      const group = repos.createServiceGroup(
+        db,
+        "VPN",
+        "vpn",
+        null,
+        "vpn.example.com",
+        {
+          health_check_enabled: true,
+          health_check_type: "http",
+          health_check_port: 1,
+          health_check_timeout_ms: 200,
+          health_check_path: "/",
+        },
+      );
+      const service = repos.createService(db, "Svc", "svc");
+      repos.setServiceGroup(db, service.id, group.id);
+      repos.setServiceEnabled(db, service.id, true);
+      const binding = repos.insertBinding(db, domain.id, service.id, "@", null);
+      repos.updateBindingLbConfig(db, binding.id, {
+        health_check_enabled: true,
+        health_check_type: "tcp",
+        health_check_port: tcp.port,
+        health_check_timeout_ms: 500,
+      });
+      repos.replaceBindingIpsWithMeta(db, binding.id, [
+        { ip: "127.0.0.1", weight: 1, priority: 1 },
+      ]);
+      const node = repos.findNodeByIp(db, "127.0.0.1");
+      expect(node).not.toBeNull();
+
+      await healthCheckService.runAllChecks(db, {
+        probeGapMs: 0,
+        thresholds: {
+          degradedFailures: 1,
+          downFailures: 1,
+          latencyWarnMs: 1000,
+        },
+      });
+
+      const bindingHealth = repos.getIpHealthStatusRow(
+        db,
+        "binding",
+        binding.id,
+        "127.0.0.1",
+      );
+      const groupHealth = repos.getIpHealthStatusRow(
+        db,
+        "group",
+        group.id,
+        "127.0.0.1",
+      );
+      const after = repos.getNode(db, node!.id);
+
+      expect(bindingHealth?.status).toBe("up");
+      expect(groupHealth?.status).toBe("down");
+      expect(after.health_status).toBe("healthy");
+      expect(after.consecutive_failures).toBe(0);
+      expect(after.last_failure_reason).toBeNull();
+    } finally {
+      await new Promise<void>((resolve) => tcp.server.close(() => resolve()));
+    }
+  });
 });
 
 describe("CNAME health mapped onto service IPs", () => {