feat(diagnostics-otel): add genai usage span identity

CHANGELOG.md

@@ -39,6 +39,7 @@ Docs: https://docs.openclaw.ai
   kept as a deprecated compatibility fallback. Thanks @vincentkoc.
 - Diagnostics/OTEL: add the GenAI `gen_ai.client.operation.duration` histogram for model-call latency in seconds with bounded provider/model/API and error attributes. Thanks @vincentkoc.
 - Diagnostics/OTEL: add GenAI usage token attributes to model-usage spans, including cache read/write input token counts without session identifiers or prompt/response content. Thanks @vincentkoc.
+- Diagnostics/OTEL: include bounded GenAI operation, provider, and request-model attributes on model-usage spans so token usage remains self-describing without diagnostic identifiers. Thanks @vincentkoc.
 - Diagnostics/OTEL: add bounded outbound message delivery lifecycle diagnostics and export them as low-cardinality delivery spans/metrics without message body, recipient, room, or media-path data. (#71471) Thanks @vincentkoc and @jlapenna.
 - Diagnostics/OTEL: emit bounded exec-process diagnostics and export them as `openclaw.exec` spans without exposing command text, working directories, or container identifiers. (#71451) Thanks @vincentkoc and @jlapenna.
 - Diagnostics/OTEL: support `OPENCLAW_OTEL_PRELOADED=1` so the plugin can reuse an already-registered OpenTelemetry SDK while keeping OpenClaw diagnostic listeners wired. (#71450) Thanks @vincentkoc and @jlapenna.

extensions/diagnostics-otel/src/service.test.ts

@@ -768,6 +768,9 @@ describe("diagnostics-otel service", () => {
     );
     expect(modelUsageCall?.[1]).toMatchObject({
       attributes: {
+        "gen_ai.operation.name": "chat",
+        "gen_ai.provider.name": "anthropic",
+        "gen_ai.request.model": "claude-sonnet-4.6",
         "gen_ai.usage.input_tokens": 150,
         "gen_ai.usage.output_tokens": 40,
         "gen_ai.usage.cache_read.input_tokens": 30,

extensions/diagnostics-otel/src/service.ts

@@ -953,6 +953,7 @@ export function createDiagnosticsOtelService(): OpenClawPluginService {
           (usage.input ?? 0) + (usage.cacheRead ?? 0) + (usage.cacheWrite ?? 0);
         const spanAttrs: Record<string, string | number> = {
           ...attrs,
+          ...genAiAttrs,
           "openclaw.tokens.input": usage.input ?? 0,
           "openclaw.tokens.output": usage.output ?? 0,
           "openclaw.tokens.cache_read": usage.cacheRead ?? 0,