chore(taiko-client): add more preconfirmation metrics

[davidtaikocha]

No description provided.

[Copilot]

Pull Request Overview

This PR adds new metrics for preconfirmation events in the taiko-client to enhance monitoring of P2P envelope handling.

• Introduces three new counters in the metrics package for tracking invalid, outdated, and cached envelopes.
• Updates the preconfirmation server to increment the new metrics based on envelope validation and caching events.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
packages/taiko-client/internal/metrics/metrics.go	Adds three new counter metrics for tracking preconfirmation envelope statuses
packages/taiko-client/driver/preconf_blocks/server.go	Integrates metric counter increments at key points during envelope processing

Comments suppressed due to low confidence (3)

packages/taiko-client/driver/preconf_blocks/server.go:194

• Consider adding unit tests to verify that the metric counter for invalid envelopes is incremented as expected when an invalid envelope is encountered.

metrics.DriverPreconfP2PInvalidEnvelopeCounter.Inc()

packages/taiko-client/driver/preconf_blocks/server.go:204

• Consider adding unit tests to confirm that the outdated envelope counter increments correctly when the block number is less than or equal to the current head L1 origin block ID.

metrics.DriverPreconfP2POutdatedEnvelopeCounter.Inc()

packages/taiko-client/driver/preconf_blocks/server.go:253

• Consider adding unit tests to ensure that the envelope cached counter is properly incremented when an envelope is added to the payloads cache.

metrics.DriverPreconfP2PEnvelopeCachedCounter.Inc()

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 38.65%. Comparing base (1dce498) to head (bf997d3).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...kages/taiko-client/driver/preconf_blocks/server.go	0.00%	3 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
packages/taiko-client/internal/metrics/metrics.go	0.00% <ø> (ø)
...kages/taiko-client/driver/preconf_blocks/server.go	17.91% <0.00%> (-0.15%)	⬇️

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