miner: add more metrics for mev

[buddh0]

Description

miner: add more metrics for mev

Rationale

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Example

add an example CLI or API response...

Changes

Notable changes:

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• ...

[Copilot]

Pull Request Overview

This PR adds detailed MEV-related metrics and a spelling fix in the miner and bid simulator, and propagates a receiveTime context value for timing.

• Registers new timers, a gauge, and a counter to track bid pre-checks, simulation phases, interrupts, timeouts, and processing speed.
• Propagates receiveTime via context from the API layer into the simulator to seed timing metrics.
• Fixes a typo in the miner’s “too late” error message.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 5 comments.

File	Description
miner/miner_mev.go	Registers bidPreCheckTimer and corrects “befor”→“before” typo
miner/bid_simulator.go	Adds metrics (timers/gauge/counter), receiveTime handling, and logging updates
internal/ethapi/api_mev.go	Injects receiveTime into context before calling SendBid

Comments suppressed due to low confidence (1)

miner/bid_simulator.go:36

• [nitpick] The variable and metric name sim1stBid mixes digits and letters; consider renaming to simFirstBidTimer and "bid/sim/simFirstBid" for clarity and consistency.

bidSim1stBidTimer    = metrics.NewRegisteredTimer("bid/sim/sim1stBid", nil)

[Copilot]

Using a plain string as a context key can lead to collisions. Define a private type key and a const receiveTimeKey to safely store and retrieve this value.

Suggested change

	timer := time.NewTimer(1 * time.Second)
	defer timer.Stop()
	replyCh := make(chan error, 1)
	receiveTime, ok := ctx.Value("receiveTime").(int64)
	type key struct{}
	const receiveTimeKey key = key{}
	timer := time.NewTimer(1 * time.Second)
	defer timer.Stop()
	replyCh := make(chan error, 1)
	receiveTime, ok := ctx.Value(receiveTimeKey).(int64)

[MRHUNG369]

0x3E3e258a9A8bF9E016c09dB376F493C1f13BBAFc