feat(jsonrpc): implement middleware pipeline and OpenTelemetry tracing

[jknack]

Introduce a robust, JSON-RPC 2.0 compliant middleware pipeline and
execution engine, alongside OpenTelemetry instrumentation.

The new pipeline relies on a chain of JsonRpcInvoker instances. To
strictly adhere to the JSON-RPC 2.0 spec, the pipeline suppresses raw
exceptions, wrapping all application and protocol errors (e.g., Parse
Error, Invalid Request) inside a JsonRpcResponse. It also leverages
Optional<JsonRpcResponse> to properly handle fire-and-forget
Notifications (which require no response) versus standard Method Calls.

Key additions:

• JsonRpcInvoker: Middleware interface using Optional<JsonRpcResponse>
  to support both standard calls and notifications. Enforces an exception-
  safe architecture by requiring errors to be returned in the response.
• JsonRpcExecutor: The terminal invoker that routes requests to target
  services. Acts as the ultimate safety net, safely translating uncaught
  exceptions and protocol faults into valid JSON-RPC error objects.
• OtelJsonRcpTracing: OpenTelemetry middleware that traces RPC spans.
  It integrates perfectly with the exception-less pipeline by inspecting
  the response envelope for ErrorDetail to accurately report span
  success or failure, logging semantic attributes like rpc.method and
  rpc.jsonrpc.request_id.

fix #3921 #3920