test: add e2e test for OpenCensus to OpenTelemetry metrics migration - #1369
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Adds TestOTelMetrics and TestOTelMetricsWatcherAfterRun e2e tests for the OC→OTel metrics migration in Tekton Results (PR tektoncd#1249). Scrapes the tekton-results-watcher pod /metrics endpoint to verify: - kn_workqueue_* and go_* infrastructure metrics (OTel naming) - watcher_run_storage_latency_seconds histogram increments by exactly 1 after a completed TaskRun is stored by the watcher - Old OpenCensus metric names absent Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
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Adds TestOTelMetrics, a consolidated e2e test for the OC→OTel metrics migration in Tekton Results (PR #1249). The test scrapes the tekton-results-watcher pod's /metrics endpoint on port 9090 and asserts:
Verified locally with the full results e2e stack (PostgreSQL, TLS, API server, watcher) deployed via test/e2e/01-install.sh.
Relates to #1249
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