feat(telemetry): add resourceAttributes to OTLP backends

[codefromthecrypt]

What type of PR is this?
feat(telemetry): add new feature

What this PR does / why we need it:
Adds support for resource attributes on OTLP metrics and tracing sinks, enabling callers like Envoy AI Gateway to map all attributes required for Elastic Cloud OTLP endpoints.

This completes the OTEL_RESOURCE_ATTRIBUTES equivalent for all three OTLP signals:

• Access Logs: Deprecates resources field in favor of resourceAttributes (maps to Envoy's resource_attributes)
• Tracing: New resourceAttributes field (maps to Envoy's resource_detectors with StaticConfigResourceDetector)
• Metrics: New resourceAttributes field (maps to Envoy's resource_detectors with StaticConfigResourceDetector)

Example use case: Setting service.name, service.version, and deployment.environment for proper service identification in observability backends like Elastic APM.

otel-tui

Release Notes: Yes

[netlify]

✅ Deploy Preview for cerulean-figolla-1f9435 canceled.

Name	Link
🔨 Latest commit	0c00e74
🔍 Latest deploy log	https://app.netlify.com/projects/cerulean-figolla-1f9435/deploys/697b2828ae18f80008d0cf63

[codecov]

Codecov Report

❌ Patch coverage is 92.98246% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.69%. Comparing base (c9e3d5f) to head (0c00e74).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/gatewayapi/listener.go	86.66%	1 Missing and 1 partial ⚠️
internal/xds/translator/tracing.go	85.71%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7972      +/-   ##
==========================================
+ Coverage   73.65%   73.69%   +0.03%     
==========================================
  Files         239      240       +1     
  Lines       36311    36333      +22     
==========================================
+ Hits        26745    26775      +30     
+ Misses       7671     7662       -9     
- Partials     1895     1896       +1     

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[axw]

@codefromthecrypt can you see any docs in traces-*? If there are, can you grab one so I can see what it looks like? Might be an issue with the UI/data contract

[axw]

Thanks, so definitely seems to be an issue with the fields...

Nothing obvious jumps out. If you're able to grab an OTLP dump (OTLP/JSON is fine if easier to drop here) then I can try to reproduce and see what's up (probably on Monday).

[codefromthecrypt]

@zhaohuabing or anyone else can you please merge this? getting really close to otel working. aigw is still using console logs as this is missing and until it is there it won't be able to switch effectively as otel without consistent resource attrs isn't really useful. envoyproxy/ai-gateway#1808

[arkodg]

is a similar change needed for k8s ?

[codefromthecrypt]

next commit should fix that. thanks!

[arkodg]

LGTM thanks

[zirain]

@codefromthecrypt can you fix the conflict?

[codefromthecrypt]

@zhaohuabing @arkodg @zirain I deprecated the resources -> resourceAttributes in logs then made the two new ones resourceAttributes re-built and ran through the demo and updated the screen shots which show it works. PTAL 🤞

[zhaohuabing]

@zhaohuabing @arkodg @zirain I deprecated the resources -> resourceAttributes in logs then made the two new ones resourceAttributes re-built and ran through the demo and updated the screen shots which show it works. PTAL 🤞
Great! Thanks!

[codefromthecrypt]

rebased

[cnvergence]

/retest

[cnvergence]

/retest