test(tracing): add OpenTelemetry tracing example with Jaeger

[ArtDu]

Summary

Add test example demonstrating distributed tracing using OpenTelemetry API with Handlers.

Changes

• Add testOpenTelemetryTracingWithJaeger() test method
• Create spans for request lifecycle tracking:
  • tarantool.{TYPE}:{syncId} - main request span
  • tarantool.{TYPE}.timeout:{syncId} - timeout tracking span
• Parse request/response data using Jackson mapping
• Export traces to Jaeger via TestContainer
• Show proper flamegraph with timeout and late response handling

Test Features

• onBeforeSend: Creates spans with request type, function name, arguments
• onSuccess: Ends spans with OK status and response data
• onTimeout: Records timeout error in dedicated span
• onIgnoredResponse: Handles late responses after timeout

Usage

The test is @Disabled by default. To run:

1. Enable the test by removing @Disabled
2. Run test - Jaeger starts via TestContainer
3. Open printed URL (http://localhost:16686) in browser
4. View traces with flamegraph

Example Output

tarantool.CALL:7
├── tarantool.CALL.timeout:7 [ERROR]
└── (late response handling)

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