packages/sdk — OpenTelemetry test instrumentation

[AKogut]

Context

Shared instrumentation that any reporter builds on: constructs spans per the test semantic conventions and exports via OTLP/HTTP.

Scope

• Span builders for run/case/step following the conventions
• OTLP/HTTP exporter with batching, zstd, idempotency key per run
• Offline/degraded mode: buffer to disk, flush later (CI resilience)
• Config: endpoint, project token, sampling
• Fingerprint helper (delegates to @flakemetry/core)

Acceptance criteria

• Emitting a synthetic run produces spec-conformant OTLP the api accepts
• Exporter never throws into the test process (fail-open)