use async sleep in pepper

[zjma]

Description

Test Plan

[trunk-io]

⏱️ 6h 9m total CI duration on this PR

Job	Cumulative Duration	Recent Runs
rust-smoke-tests	1h 38m	🟩
rust-lints	1h 17m	🟥 ⬜ 🟩
windows-build	51m	🟩 🟩 🟩
rust-unit-tests	41m	⬜ ⬜ 🟩
execution-performance / single-node-performance	21m	🟩
rust-images / rust-all	14m	🟩
forge-compat-test / forge	13m	🟩
forge-e2e-test / forge	13m	🟩
run-tests-main-branch	10m	🟩 ⬜ 🟩
check	10m	🟩 ⬜ 🟩
cli-e2e-tests / run-cli-tests	6m	🟩
check-dynamic-deps	6m	🟩 🟩 🟩
general-lints	5m	🟩 ⬜ 🟩
semgrep/ci	1m	🟩 🟩 🟩
node-api-compatibility-tests / node-api-compatibility-tests	50s	🟩
file_change_determinator	33s	🟩 🟩 🟩
file_change_determinator	29s	🟩 🟩 🟩
execution-performance / file_change_determinator	15s	🟩
file_change_determinator	12s	🟩
permission-check	10s	🟩 🟩 🟩
permission-check	10s	🟩 🟩 🟩
permission-check	10s	🟩 🟩 🟩
permission-check	7s	🟩 🟩 🟩
permission-check	5s	🟩
determine-docker-build-metadata	3s	🟩

🚨 2 jobs on the last run were significantly faster/slower than expected

Job	Duration	vs 7d avg	Delta
rust-lints	1h 12m	8m
rust-smoke-tests	1h 38m	31m

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[geekflyer]

can you also remove the unused thread::sleep import plz?

[github-actions]

✅ Forge suite realistic_env_max_load success on 6eeac1df6cbc2c0311bfc782bef4fccf8965f765

two traffics test: inner traffic : committed: 7358 txn/s, latency: 5296 ms, (p50: 5100 ms, p90: 6300 ms, p99: 10200 ms), latency samples: 3201160
two traffics test : committed: 100 txn/s, latency: 1883 ms, (p50: 1800 ms, p90: 2100 ms, p99: 5700 ms), latency samples: 1760
Latency breakdown for phase 0: ["QsBatchToPos: max: 0.217, avg: 0.201", "QsPosToProposal: max: 0.355, avg: 0.323", "ConsensusProposalToOrdered: max: 0.483, avg: 0.450", "ConsensusOrderedToCommit: max: 0.314, avg: 0.296", "ConsensusProposalToCommit: max: 0.756, avg: 0.746"]
Max round gap was 1 [limit 4] at version 1511250. Max no progress secs was 3.969742 [limit 15] at version 1511250.
Test Ok

• Grafana dashboard
• Humio Logs
• Axiom Logs
• Test runner output
• Test run is land-blocking

[github-actions]

✅ Forge suite compat success on aptos-node-v1.9.5 ==> 6eeac1df6cbc2c0311bfc782bef4fccf8965f765

Compatibility test results for aptos-node-v1.9.5 ==> 6eeac1df6cbc2c0311bfc782bef4fccf8965f765 (PR)
1. Check liveness of validators at old version: aptos-node-v1.9.5
compatibility::simple-validator-upgrade::liveness-check : committed: 6780 txn/s, latency: 4891 ms, (p50: 4800 ms, p90: 8800 ms, p99: 9300 ms), latency samples: 237300
2. Upgrading first Validator to new version: 6eeac1df6cbc2c0311bfc782bef4fccf8965f765
compatibility::simple-validator-upgrade::single-validator-upgrade : committed: 683 txn/s, latency: 35141 ms, (p50: 38100 ms, p90: 54600 ms, p99: 58200 ms), latency samples: 57380
3. Upgrading rest of first batch to new version: 6eeac1df6cbc2c0311bfc782bef4fccf8965f765
compatibility::simple-validator-upgrade::half-validator-upgrade : committed: 132 txn/s, submitted: 647 txn/s, expired: 514 txn/s, latency: 26161 ms, (p50: 9500 ms, p90: 53800 ms, p99: 54000 ms), latency samples: 8871
4. upgrading second batch to new version: 6eeac1df6cbc2c0311bfc782bef4fccf8965f765
compatibility::simple-validator-upgrade::rest-validator-upgrade : committed: 2431 txn/s, latency: 12402 ms, (p50: 11700 ms, p90: 18700 ms, p99: 19000 ms), latency samples: 114280
5. check swarm health
Compatibility test for aptos-node-v1.9.5 ==> 6eeac1df6cbc2c0311bfc782bef4fccf8965f765 passed
Test Ok

• Grafana dashboard
• Humio Logs
• Axiom Logs
• Test runner output
• Test run is land-blocking