[Review] Review of #1819

[Olshansk]

Changes to accompany review #2 of #1819

[Copilot]

Pull Request Overview

This PR implements a comprehensive refactoring of the relay miner's request processing pipeline, introducing a new mining supervisor architecture and performance tracking system. The changes transition from a single-threaded relay processing model to a more scalable architecture with dedicated worker pools and sophisticated performance monitoring.

• Introduces RelayMiningSupervisor with configurable worker pools for delayed validation and rewardability checks
• Implements a new performance tracking system using buffered span recording for detailed timing analysis
• Refactors session management to use lock-free concurrent data structures (xsync.Map)

Reviewed Changes

Copilot reviewed 16 out of 17 changed files in this pull request and generated 12 comments.

Show a summary per file

File	Description
pkg/relayer/proxy/sync.go	Major refactoring of sync request handling with new supervisor integration and performance tracking
pkg/relayer/proxy/mining_supervisor.go	New mining supervisor implementation with worker pool and session cache management
pkg/relayer/performance_tracker.go	New performance tracking system with span-based timing and buffered metrics
pkg/relayer/proxy/relay_meter.go	Converted to use lock-free concurrent data structures and added relay cost memoization
pkg/relayer/metrics.go	Added new mining queue metrics and improved instruction timing infrastructure
pkg/relayer/config/types.go	Added mining supervisor configuration structures

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[Copilot]

Remove commented-out import. The sync package import has been removed but the comment should be deleted.

Suggested change

//"sync"

[Copilot]

Remove commented-out sync import and mutex-related code. These have been replaced with concurrent data structures but the old implementations should be deleted.

[Copilot]

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[jorgecuesta]

LGTM, most of them are rename and comments