Fix OTLP log export: BatchLogRecordProcessor takes an options object

sdk-logs 0.221 changed the constructor to {exporter, ...} instead of a
bare exporter argument; passing the exporter directly silently left
this._exporter undefined, so every log export failed inside
suppressed error handling and no logs ever reached the collector.

server/otel.js

@@ -27,7 +27,7 @@ const sdk = new NodeSDK({
     exportIntervalMillis: 15000,
   }),
   logRecordProcessors: [
-    new BatchLogRecordProcessor(new OTLPLogExporter({ url: `${endpoint}/v1/logs` })),
+    new BatchLogRecordProcessor({ exporter: new OTLPLogExporter({ url: `${endpoint}/v1/logs` }) }),
   ],
   instrumentations: [
     getNodeAutoInstrumentations({