Matrix lint workflow by hook stage

[adamtheturtle]

Summary

Refactor the lint workflow to parallelize hook stage execution by adding hook-stage to the build matrix. This runs all three hook stages (pre-commit, pre-push, manual) in parallel across each platform instead of sequentially.

Changes

• Added hook-stage: [pre-commit, pre-push, manual] to the build matrix
• Replaced three sequential prek run commands with a single parameterized command using ${{ matrix.hook-stage }}

This expands the matrix from 2 jobs (2 platforms) to 6 jobs (2 platforms × 3 hook stages) running in parallel.

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Note

Low Risk
CI-only workflow refactor that changes job fan-out/ordering but not application/runtime code; main risk is longer queue time or unexpected matrix execution behavior.

Overview
Parallelizes the Lint GitHub Actions workflow by adding hook-stage to the build matrix, running pre-commit, pre-push, and manual as separate matrix jobs per platform.

Replaces three sequential prek run invocations with a single parameterized command using ${{ matrix.hook-stage }}, expanding the matrix from 2 to 6 jobs and improving failure isolation/throughput.

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