chore: sync deps, fix lint issues, standardize CI

[ankurs]

Summary

• Update tracing dependency v0.0.6 to v0.0.7
• Fix capitalized error strings (ErrWTF, ErrInvalidBuilder)
• Upgrade golangci.yml from v1 to v2 format
• Standardize CI with separate build/test/lint jobs

Test plan

• make build passes
• make test passes (with -race)
• make lint passes with 0 issues

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 1859c33d-a17a-4b9b-ba78-2fdf1b0ae811

📥 Commits

Reviewing files that changed from the base of the PR and between b0c74ee and 8a1f832.

⛔ Files ignored due to path filters (1)

• go.sum is excluded by !**/*.sum

📒 Files selected for processing (6)

• .github/workflows/go.yml
• .golangci.yml
• Makefile
• go.mod
• plan.go
• types.go

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/update-03-2026

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[Copilot]

Pull request overview

This PR modernizes the project’s dependency and CI/lint setup by bumping the tracing module, aligning error strings with Go conventions, migrating golangci-lint config to the v2 schema, and splitting GitHub Actions into dedicated build/test/lint jobs.

Changes:

• Bump github.com/go-coldbrew/tracing from v0.0.6 to v0.0.7.
• Normalize error strings to start lowercase (e.g., ErrInvalidBuilder, ErrWTF).
• Upgrade .golangci.yml to v2 format and restructure CI into separate build/test/lint jobs.

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
types.go	Lowercases ErrInvalidBuilder message to match Go error-string style.
plan.go	Lowercases ErrWTF message.
go.mod	Updates tracing dependency version.
Makefile	Adds lint/bench to .PHONY; adjusts lint target invocation behavior.
.golangci.yml	Migrates golangci-lint configuration to v2 schema.
.github/workflows/go.yml	Splits CI into separate build/test/lint jobs and routes build/test via make.

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 7 changed files in this pull request and generated no new comments.

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 7 changed files in this pull request and generated 1 comment.

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