[planning-server]: adding a missing @opentelemetry/api package

Author: jakedahn

typescript/packages/planning-server/package.json

@@ -42,6 +42,7 @@
     "@ai-sdk/openai": "^0.0.71",
     "@arizeai/openinference-semantic-conventions": "^1.0.0",
     "@arizeai/openinference-vercel": "^2.0.0",
+    "@opentelemetry/api": "^1.9.0",
     "@opentelemetry/exporter-trace-otlp-proto": "^0.56.0",
     "@opentelemetry/resources": "^1.29.0",
     "@vercel/otel": "^1.10.0",