feat(peer): atomic peer counters

[nplanelcisco]

Avoiding a peer.config.ReadCopy() per message

[Copilot]

Pull request overview

This PR optimizes peer message/timer statistic tracking by avoiding a pConf.ReadCopy() + pConf.Update() on every message, instead keeping counters in atomic fields on the FSM and snapshotting them when building the neighbor config view.

Changes:

• Introduce atomic-backed message counters (counterStats) and timer state (timerStats) on fsm, updated on message processing.
• Populate oc.Neighbor.State.Messages and Timers.State.UpdateRecvTime in BgpServer.toConfig() via atomic loads from the FSM instead of relying on pConf state updates.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
pkg/server/server.go	Snapshots peer message/timer stats via atomic loads when building a neighbor config/state view.
pkg/server/fsm.go	Adds atomic-backed message counters/timer state to fsm and updates them per message/stat event.

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[nplanelcisco]

/copilot

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 7 comments.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

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[fujita]

Good improvement! Pushed, thanks.