test(o11y): End-to-end HTTP to Cloud Trace integration test#3822

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westarle wants to merge 8 commits intogoogleapis:mainfrom

westarle:feat/telemetry-e2e-test

Commits on Nov 24, 2025

feat(integration-tests): implement CloudTraceClient
westarle
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test(integration-tests): finalize end-to-end telemetry test
westarle
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refactor: replace custom Cloud Trace client with generated `TraceService` and add GAX retry logic in telemetry test.
westarle
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Deleted prototype cloud trace client.
westarle
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fmt
westarle
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refactor: Replace `gax` retry policy with a manual polling loop for Cloud Trace API verification.
westarle
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fix: Retry trace fetching on `Internal` RPC errors in addition to `NotFound` and improve error logging.
westarle
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refactor: make auth interceptor await initial credential refresh and remove manual delays in tests.
westarle
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