Generic OpenTelemetry handler for AgentObs.

This handler creates basic OpenTelemetry spans without OpenInference semantic conventions. Use this handler for generic OTel backends that don't support OpenInference (e.g., Jaeger, Zipkin, generic APM tools).

Configuration

config :agent_obs,
  handlers: [AgentObs.Handlers.Generic]

config :agent_obs, AgentObs.Handlers.Generic,
  endpoint: "http://localhost:4318"

Differences from Phoenix Handler

• Does not use OpenInference semantic conventions
• Simpler attribute structure (no message flattening)
• Uses standard OTel span kinds (INTERNAL, CLIENT, etc.)
• Suitable for general-purpose observability platforms

OpenTelemetry SDK Configuration

config :opentelemetry,
  span_processor: :batch,
  resource: [service: [name: "my_app"]]

config :opentelemetry_exporter,
  otlp_protocol: :http_protobuf,
  otlp_endpoint: System.get_env("OTEL_EXPORTER_OTLP_ENDPOINT")