[Indexer-Grpc-V2] Add implementation for Ping in FN.

[grao1991]

Description

How Has This Been Tested?

Key Areas to Review

Type of Change

• New feature
• Bug fix
• Breaking change
• Performance improvement
• Refactoring
• Dependency update
• Documentation update
• Tests

Which Components or Systems Does This Change Impact?

• Validator Node
• Full Node (API, Indexer, etc.)
• Move/Aptos Virtual Machine
• Aptos Framework
• Aptos CLI/SDK
• Developer Infrastructure
• Move Compiler
• Other (specify)

Checklist

• I have read and followed the CONTRIBUTING doc
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I identified and added all stakeholders and component owners affected by this change as reviewers
• I tested both happy and unhappy path of the functionality
• I have made corresponding changes to the documentation

[trunk-io]

⏱️ 1h 53m total CI duration on this PR

Slowest 15 Jobs	Cumulative Duration	Recent Runs
execution-performance / single-node-performance	50m	🟩 🟩
forge-e2e-test / forge	13m	🟩
execution-performance / test-target-determinator	10m	🟩 🟩
test-target-determinator	9m	🟩 🟩
check-dynamic-deps	8m	🟩 🟩 🟩 🟩
rust-cargo-deny	5m	🟩 🟩 🟩
rust-doc-tests	5m	🟩
rust-doc-tests	5m	🟩
fetch-last-released-docker-image-tag	3m	🟩 🟩
semgrep/ci	2m	🟩 🟩 🟩 🟩
general-lints	1m	🟩 🟩 🟩
file_change_determinator	40s	🟩 ⬜ 🟩 🟩
file_change_determinator	21s	🟩 🟩
permission-check	9s	🟩 🟩 🟩 🟩
permission-check	9s	🟩 🟩 🟩 🟩

_{settings ⋅ feedback ⋅ docs ⋅ learn more about trunk.io}

[github-actions]

✅ Forge suite compat success on 17540fad8e88ab5681f3a91190b9f5d37e53d2ef ==> ddd7cae2fe38773364ec69dbf5df5291fbc9cc78

Compatibility test results for 17540fad8e88ab5681f3a91190b9f5d37e53d2ef ==> ddd7cae2fe38773364ec69dbf5df5291fbc9cc78 (PR)
1. Check liveness of validators at old version: 17540fad8e88ab5681f3a91190b9f5d37e53d2ef
compatibility::simple-validator-upgrade::liveness-check : committed: 11573.28 txn/s, latency: 2761.70 ms, (p50: 2500 ms, p70: 3100, p90: 3400 ms, p99: 13500 ms), latency samples: 378140
2. Upgrading first Validator to new version: ddd7cae2fe38773364ec69dbf5df5291fbc9cc78
compatibility::simple-validator-upgrade::single-validator-upgrading : committed: 4208.82 txn/s, latency: 7234.86 ms, (p50: 8100 ms, p70: 8500, p90: 8800 ms, p99: 8900 ms), latency samples: 92200
compatibility::simple-validator-upgrade::single-validator-upgrade : committed: 4309.53 txn/s, latency: 7884.12 ms, (p50: 8900 ms, p70: 8900, p90: 9200 ms, p99: 9300 ms), latency samples: 152380
3. Upgrading rest of first batch to new version: ddd7cae2fe38773364ec69dbf5df5291fbc9cc78
compatibility::simple-validator-upgrade::half-validator-upgrading : committed: 4443.24 txn/s, latency: 6983.30 ms, (p50: 7700 ms, p70: 8200, p90: 8600 ms, p99: 8800 ms), latency samples: 92400
compatibility::simple-validator-upgrade::half-validator-upgrade : committed: 4493.28 txn/s, latency: 7534.11 ms, (p50: 8400 ms, p70: 8500, p90: 8800 ms, p99: 8900 ms), latency samples: 160560
4. upgrading second batch to new version: ddd7cae2fe38773364ec69dbf5df5291fbc9cc78
compatibility::simple-validator-upgrade::rest-validator-upgrading : committed: 7046.25 txn/s, latency: 4290.16 ms, (p50: 4700 ms, p70: 4900, p90: 6000 ms, p99: 6200 ms), latency samples: 133100
compatibility::simple-validator-upgrade::rest-validator-upgrade : committed: 6965.68 txn/s, latency: 4860.75 ms, (p50: 4800 ms, p70: 6000, p90: 6300 ms, p99: 6500 ms), latency samples: 236400
5. check swarm health
Compatibility test for 17540fad8e88ab5681f3a91190b9f5d37e53d2ef ==> ddd7cae2fe38773364ec69dbf5df5291fbc9cc78 passed
Test Ok

• Grafana dashboard
• Humio Logs
• Axiom Logs
• Validator CPU Profile
• Fullnode CPU Profile
• Test runner output
• Test run is land-blocking

[github-actions]

✅ Forge suite realistic_env_max_load success on ddd7cae2fe38773364ec69dbf5df5291fbc9cc78

two traffics test: inner traffic : committed: 15008.16 txn/s, latency: 2640.50 ms, (p50: 2700 ms, p70: 2700, p90: 2900 ms, p99: 3100 ms), latency samples: 5706420
two traffics test : committed: 99.97 txn/s, latency: 1430.40 ms, (p50: 1400 ms, p70: 1400, p90: 1600 ms, p99: 1800 ms), latency samples: 1780
Latency breakdown for phase 0: ["MempoolToBlockCreation: max: 1.617, avg: 1.434", "ConsensusProposalToOrdered: max: 0.290, avg: 0.286", "ConsensusOrderedToCommit: max: 0.402, avg: 0.391", "ConsensusProposalToCommit: max: 0.688, avg: 0.677"]
Max non-epoch-change gap was: 0 rounds at version 0 (avg 0.00) [limit 4], 0.71s no progress at version 267373 (avg 0.19s) [limit 15].
Max epoch-change gap was: 0 rounds at version 0 (avg 0.00) [limit 4], 0.64s no progress at version 2996104 (avg 0.64s) [limit 16].
Test Ok

• Grafana dashboard
• Humio Logs
• Axiom Logs
• Validator CPU Profile
• Fullnode CPU Profile
• Test runner output
• Test run is land-blocking