Add E2E test verifying OTEL tracing across Zenko services

[delthas]

Not human-reviewed yet. Not asking for reviews at the moment!

Summary

• Deploy Jaeger all-in-one (memory-only, OTLP-enabled) in the kind CI
  cluster alongside existing dependencies (Keycloak, Prometheus, etc.)
• Patch the Zenko CR with spec.otel (enabled, sampling ratio 1.0) so
  every request is traced during CI — this also acts as a smoke test
  that OTEL doesn't break existing @PreMerge tests
• Add a new @PreMerge CTST scenario that puts an S3 object and then
  polls the Jaeger query API to assert a trace exists with spans from
  both cloudserver and vault

What changed

File	What
install-kind-dependencies.sh	Jaeger Deployment + Service YAML
configure-e2e-ctst.sh	kubectl patch zenko with spec.otel, wait for cloudserver + vault rollout
setup-e2e-env.sh	Jaeger port-forward + JaegerQueryEndpoint in world params
world/Zenko.ts	JaegerQueryEndpoint added to ZenkoWorldParameters
features/otel-tracing.feature	New @PreMerge scenario
steps/otel-tracing.ts	Jaeger polling (30s timeout / 2s interval) + trace assertions
OTEL.md	Checklist updated

Why

Parent ticket OS-1072
tracks adding OpenTelemetry tracing across the Zenko stack. This PR
adds CI coverage to verify that traces actually propagate end-to-end
(cloudserver → vault) once OTEL is enabled on the CR.

Issue: ZENKO-5258

[bert-e]

Hello delthas,

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[bert-e]

Waiting for approval

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