* test(integration): wait for customer spend rows and use owned OpenRouter cost
* ci: isolate integration workers and clean up resources after crashes
* docs: describe isolated extensions workers and shard census
* fix(ci): restore integration service and fixture guarantees
* fix(integration): preserve replay IDs and native route fixtures
* fix(tests): scope integration harness imports to each unit case
* fix(ci): preserve fixtures and wait for owned workers
* fix(ci): isolate nested runs and telemetry cases
* fix(ci): make worker readiness and fault tests deterministic
* chore(ci): drop MCP fixture repair already covered by main
* chore(ci): keep the local catalog fix from main
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Co-authored-by: yuneng <yuneng@berri.ai>
