test: add upstream compatibility contracts

[Hector Hernandez (hectorhdzg)]

Summary

Adds test-only compatibility coverage for upstream OpenTelemetry behavior relied upon by the distro.

The contracts cover:

• Azure App Service, Functions, Container Apps, AKS, and VM resource detectors
• Positive, absent, partial, malformed, and transport-failure detector paths
• Resource environment parsing, merging, schema handling, and asynchronous attributes
• service.instance.id precedence, opt-in behavior, stability, and worker uniqueness
• Kubernetes pod precedence when deriving Azure Monitor cloud_RoleInstance
• Host, OS, process, and service-instance detection
• Trace, metric, log, and W3C trace-context SDK behavior

[Copilot]

Copilot review overview

🟡 Changes recommended

The log contract passes an incompatible wrapper to SimpleLogRecordProcessor, preventing the test from validating log export.

Review effort: Balanced
Findings: 1

Open (1)

• Pass exporter directly instead of wrapping it · New

What changed in this PR

Adds compatibility tests for upstream OpenTelemetry behavior relied upon by the distro.

Changes:

• Covers Azure and core resource detectors.
• Verifies resource identity and precedence behavior.
• Tests trace, metric, log, and W3C propagation contracts.

File	Description
azureResourceDetectors.test.ts	Tests Azure environment detection paths.
resourceDetectors.test.ts	Tests core resource detection and merging.
resourceIdentityContracts.test.ts	Tests instance identity and precedence.
telemetrySdkContracts.test.ts	Tests telemetry SDK and propagation behavior.

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[Copilot]

Copilot review overview

🟡 Changes recommended

The stale, conflicted branch introduces unrelated changelog history and uses an incompatible log processor constructor.

Review effort: Balanced
Findings: 1 · 1

Open (2)

• Pass exporter directly instead of wrapping it
• Rebase onto main and remove unrelated changelog history · New