This test looks flaky on Windows:
```
FAIL [ 0.034s] (1442/2802) codex-otel::tests suite::otlp_http_loopback::otlp_http_exporter_sends_metrics_to_collector
stdout ───
running 1 test
test suite::otlp_http_loopback::otlp_http_exporter_sends_metrics_to_collector ... FAILED
failures:
failures:
suite::otlp_http_loopback::otlp_http_exporter_sends_metrics_to_collector
test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 14 filtered out; finished in 0.02s
stderr ───
Error: ProviderShutdown { source: InternalFailure("[InternalFailure(\"Failed to shutdown\")]") }
────────────
Summary [ 175.360s] 2802 tests run: 2801 passed, 1 failed, 15 skipped
FAIL [ 0.034s] (1442/2802) codex-otel::tests suite::otlp_http_loopback::otlp_http_exporter_sends_metrics_to_collector
```
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| .. | ||
| harness | ||
| suite | ||
| tests.rs | ||