[optqs] support fetching batches from QC signers

[ibalajiarun]

Description

[trunk-io]

⏱️ 4h 18m total CI duration on this PR

Slowest 15 Jobs	Cumulative Duration	Recent Runs
test-target-determinator	53m	🟩 🟩 🟩 🟩 🟩 (+8 more)
rust-cargo-deny	26m	🟩 🟩 🟩 🟩 🟩 (+10 more)
check-dynamic-deps	18m	🟩 🟩 🟩 🟩 🟩 (+11 more)
rust-move-tests	14m	🟩
rust-move-tests	13m	🟩
rust-move-tests	13m	🟩
rust-move-tests	13m	🟩
rust-move-tests	13m	⬜
rust-move-tests	13m	🟩
rust-move-tests	12m	🟩
rust-move-tests	12m	🟩
rust-move-tests	10m	⬜
rust-move-tests	10m	⬜
rust-move-tests	8m	🟥
semgrep/ci	7m	🟩 🟩 🟩 🟩 🟩 (+11 more)

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[github-actions]

✅ Forge suite realistic_env_max_load success on ab1b12089a435bfbcf6659fea591625aa9a0bc15

two traffics test: inner traffic : committed: 14216.02 txn/s, latency: 2915.01 ms, (p50: 2700 ms, p70: 2700, p90: 3000 ms, p99: 17500 ms), latency samples: 5405300
two traffics test : committed: 100.06 txn/s, latency: 2348.54 ms, (p50: 1400 ms, p70: 2000, p90: 3000 ms, p99: 16400 ms), latency samples: 1800
Latency breakdown for phase 0: ["MempoolToBlockCreation: max: 2.041, avg: 1.338", "ConsensusProposalToOrdered: max: 0.326, avg: 0.294", "ConsensusOrderedToCommit: max: 0.387, avg: 0.376", "ConsensusProposalToCommit: max: 0.680, avg: 0.670"]
Max non-epoch-change gap was: 1 rounds at version 18712 (avg 0.00) [limit 4], 2.50s no progress at version 18712 (avg 0.21s) [limit 15].
Max epoch-change gap was: 0 rounds at version 0 (avg 0.00) [limit 4], 15.67s no progress at version 5818058 (avg 14.52s) [limit 16].
Test Ok

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