Performance/memepool metrics

[ladamesny]

Description

Script to run a memepool benchmark analysis. Here is a sample report:

Window: 1000 ms

=== MEMPOOL STATISTICS BY NODE ===

Metrics Explained:
Ready Txs - Valid transactions that can execute immediately
Future Txs - Valid transactions waiting for dependencies (e.g., nonce)
Admission Rate- Transactions submitted per second (TPS)
Validated - Transactions checked for correctness
Revalidated - Transactions re-validated after new blocks
Pruned - Transactions included in finalized blocks
Reverified - Transactions resubmitted after chain reorganization

Node: ferdie
Average Ready Txs: 0.00
Average Future Txs: 0.02
Peak Ready Txs: 0
Peak Future Txs: 1
Avg Admission Rate: 0.00 TPS
Total Validated: 0
Total Revalidated: 0
Total Pruned: 0
Total Reverified: 0

Checklist

• Commit sequence broadly makes sense and commits have useful messages.
• The size limit of 400 LOC isn't needlessly exceeded
• The PR refers to a JIRA ticket (if one exists)
• New tests are added if needed and existing tests are updated.
• New code is documented and existing documentation is updated.
• Relevant logging and metrics added
• Any changes are noted in the changelog.md for affected crate
• Self-reviewed the diff