apollo_network_benchmark: add SQMR protocol constant

[sirandreww-starkware]

Note

Low Risk
Low risk: adds a single string constant with no behavioral changes; impact is limited to any future code that starts referencing this identifier.

Overview
Defines SQMR_PROTOCOL_NAME ("/stress-test/1.0.0") in broadcast_network_stress_test_node/protocol.rs for use as a stable protocol identifier in the network stress test node.

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[reviewable-StarkWare]

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[sirandreww-starkware]

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• apollo_network_benchmark: implement RoundRobin broadcasting logic #11560 : 3 dependent PRs (#11561 , #12722 , #13288 )
• apollo_network_benchmark: add seconds_since_epoch helper function #11559
• apollo_network_benchmark: add RoundRobin mode to enum and round_duration_seconds arg #11558
• apollo_network_benchmark: add message index detection mechanism #11557
• apollo_network_benchmark: add MessageIndexTracker struct #11556
• apollo_network_benchmark: add ReveresedSqmr receiver and registration #11555
• apollo_network_benchmark: add ReveresedSqmrSender struct and implementation #11554
• apollo_network_benchmark: add ReveresedSqmr variant to NetworkProtocol enum #11553
• apollo_network_benchmark: add Sqmr variant to MessageReceiver and registration #11552
• apollo_network_benchmark: add Sqmr variant to MessageSender with send logic #11551
• apollo_network_benchmark: add Sqmr variant to NetworkProtocol enum #11550
• apollo_network_benchmark: add SQMR protocol constant #11549 👈 (View in Graphite)
• apollo_network_benchmark: added ping latency metrics #11548
• apollo_network_benchmark: added network event metrics #11547
• apollo_network_benchmark: added SQMR session metrics #11546
• apollo_network_benchmark: added broadcast topic metrics #11545
• apollo_network_benchmark: added network metrics to network manager #11544
• apollo_network_benchmark: added broadcast metrics tracking #11543
• apollo_network_benchmark: added conditional broadcasting based on mode #11542
• apollo_network_benchmark: added broadcasting mode selection #11541
• apollo_network_benchmark: added message broadcasting task #10734 : 1 other dependent PR (#8303 )
• apollo_network_benchmark: added register metrics #10660 : 1 other dependent PR (#10661 )
• main

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

[cursor]

Unused SQMR protocol constant added

Low Severity

SQMR_PROTOCOL_NAME is introduced in protocol.rs but is never referenced anywhere in the codebase. This leaves dead code in the stress test protocol path and can mislead readers into assuming SQMR is wired when the current logic still only uses NetworkProtocol::Gossipsub.