Align tracing semconv usage and enrich OTel span attributes

[Copilot]

This updates the OpenTelemetry tracing integration to remove mixed semantic convention versions in internal/tracing and pick up the current OTel Go release. It also fills two observability gaps called out in the review: structured error.type on error spans and gen_ai.system on MCP tool-call spans.

• Tracing semconv alignment

  • Standardizes internal/tracing/span_helpers.go and its tests on semconv/v1.34.0
  • Removes the remaining v1.27.0 usage so tracing code emits a consistent schema version

• Span enrichment

  • RecordSpanError now sets error.type in addition to recording the exception and span status
  • StartToolCallSpan now includes gen_ai.system="mcp" on tool-call spans
  • Re-exports GenAISystem alongside the existing gen_ai.* helpers for consistent use across tracing code

• Dependency update

  • Bumps the direct OTel modules to v1.44.0
  • Refreshes module metadata to match the updated dependency graph

• Focused test updates

  • Extends existing tracing helper tests to assert the new error.type and gen_ai.system attributes

func RecordSpanError(span trace.Span, err error, msg string) {
    span.RecordError(err, trace.WithStackTrace(true))
    if err != nil {
        span.SetAttributes(semconv.ErrorType(err))
    }
    span.SetStatus(codes.Error, msg)
}

func StartToolCallSpan(ctx context.Context, tracer trace.Tracer, serverID, toolName string) (context.Context, trace.Span) {
    return tracer.Start(ctx, "mcp.tool_call",
        trace.WithAttributes(
            GenAISystem.String("mcp"),
            GenAIAgentID.String(serverID),
            MCPMethod.String("tools/call"),
            GenAIToolName.String(toolName),
        ),
    )
}

[Copilot]

Pull request overview

This PR updates the gateway’s OpenTelemetry tracing helpers to consistently use a single semantic conventions package version and enriches spans with additional standardized attributes to improve observability.

Changes:

• Standardize tracing helpers and tests on go.opentelemetry.io/otel/semconv/v1.34.0 (removing mixed semconv usage).
• Enrich error spans with error.type and MCP tool-call spans with gen_ai.system="mcp".
• Bump OpenTelemetry Go modules to v1.44.0 and refresh module metadata (go.mod/go.sum).

Show a summary per file

File	Description
internal/tracing/span_helpers.go	Align semconv import; add error.type on errors and gen_ai.system on tool-call spans.
internal/tracing/span_helpers_test.go	Extend tests to assert the new error.type and gen_ai.system attributes.
internal/tracing/genai_attrs.go	Re-export GenAISystem key alongside existing gen_ai.* helpers for consistent usage.
go.mod	Bump OpenTelemetry modules to v1.44.0 and update related dependencies.
go.sum	Update checksums to reflect the refreshed dependency graph after version bumps.

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• Files reviewed: 4/5 changed files
• Comments generated: 0