feat(derive): Initial Metrics

[refcell]

Description

Sets up the first set of metrics for kona-derive.

Closes #1981
Closes #1982

[refcell]

📚 $\text{Stack Overview}$

Pulls submitted in this stack:

• feat(derive): Batch Metrics #2010
• feat(derive): Max Channel Size and Timeout Metrics #2009
• feat(derive): Frame + Channel Metrics #2008
• feat(derive): Initial Metrics #2007 👈
• main

This comment was automatically generated by st.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 19 lines in your changes missing coverage. Please review.

Project coverage is 83.5%. Comparing base (19a313d) to head (b8ba2a8).
Report is 1 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
crates/protocol/derive/src/metrics/mod.rs	0.0%	19 Missing ⚠️

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[Copilot]

Pull Request Overview

Sets up initial metrics support for the kona-derive pipeline.

• Marks the macros crate as no_std
• Defines metric identifiers and an init/describe/zero API
• Instruments the L1 traversal stage and adds a metrics feature with optional dependency

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
crates/utilities/macros/src/lib.rs	Added #![no_std]
crates/protocol/derive/src/stages/l1_traversal.rs	Added update_origin, inc! and timing instrumentation
crates/protocol/derive/src/metrics/mod.rs	New Metrics struct with constants and init/describe/zero API
crates/protocol/derive/src/lib.rs	Conditional no_std and exposed metrics module
crates/protocol/derive/Cargo.toml	Added optional metrics dependency and feature

Comments suppressed due to low confidence (3)

crates/protocol/derive/src/metrics/mod.rs:19

• The doc comment refers to the P2P stack but this is for the derivation pipeline. Update the comment to accurately describe its scope.

/// Initializes metrics for the P2P stack.

crates/protocol/derive/src/stages/l1_traversal.rs:79

• New metric recording logic is not covered by existing tests; consider adding tests to verify that metrics are initialized and recorded correctly under the metrics feature.

#[cfg(feature = "metrics")]

crates/utilities/macros/src/lib.rs:9

• [nitpick] Applying #![no_std] unconditionally may prevent macros that rely on std from compiling. Consider conditionally enabling no_std based on a feature.

#![no_std]

[clabby]

Neat :D