[xunyoyo]

Summary

• replace broad OpenTelemetry shims with a minimal fastdeploy.metrics.trace_util stub to satisfy ResourceManagerV1 imports
• ensure real fastdeploy engine and cache_manager modules are loaded so tests can patch main_process_metrics and cache stubs reliably

Testing

• pytest -c tests/cov_pytest.ini tests/engine/test_resource_manager_v1.py -vv
• python -m coverage run -m pytest -c tests/cov_pytest.ini tests/engine/test_resource_manager_v1.py
• python -m coverage report -m --include='fastdeploy/engine/sched/resource_manager_v1.py'
• pre-commit run --all-files

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Codex Task