`datadog_agent` source should accept LLMObs telemetry

[xavirg]

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Use Cases

I would like to send Datadog LLMObs telemetry by instrumenting the code using https://docs.datadoghq.com/llm_observability/instrumentation/sdk?tab=python, and be ingested by Vector as the rest of the telemetry.

Attempted Solutions

Using this Vector config:

sources:
  datadog_agent:
    type: datadog_agent
    address: "0.0.0.0:8080"
    store_api_key: false
    tls:
      enabled: true
      crt_file: "${CERT_PATH}"
      key_file: "${KEY_PATH}"
      key_pass: "${AWS_CERT_PASSPHRASE}"
    multiple_outputs: true

sinks:
  drop_logs:
    type: blackhole
    inputs:
      - datadog_agent.logs
  datadog_metrics:
    type: datadog_metrics
    inputs:
      - tag_metrics
    default_api_key: "${DD_API_KEY_METRICS}"

  datadog_traces:
    type: datadog_traces
    inputs:
      - tag_traces
    default_api_key: "${DD_API_KEY_TRACES}"

Tried to send LLMObs traces, but I'm getting this error on my app:

failed to send 2 LLMObs span events to https://MY_VECTOR_HOST/api/v2/llmobs, got response code 404, status: b''

The response makes me think that the endpoint is not implemented.

Proposal

Accept Datadog traces at /api/v2/llmobs endpoint.

References

No response

Version

0.55