improve test performance

[Incanus3]

Summary by Sourcery

Document the current performance profile of the skillset test suite and remove an outdated comparison guide.

Documentation:

• Add a detailed performance profiling and optimization guide for the skillset test suite.
• Remove the obsolete skillset comparison guide.

[sourcery-ai]

Reviewer's Guide

Adds a new, detailed test-suite performance profiling and optimization guide for the skillset tests while removing the previous skillset-comparison guide.

File-Level Changes

Change	Details	Files
Introduce a detailed performance profiling and optimization guide for the test suite.	Document current skillset test-suite structure, environment, and measurement methodology. Summarize baseline timing, process-launch costs, and import-time profiling results. Identify highest-cost individual tests and attribute their runtime to subprocess usage patterns. Propose and rank optimization options (direct parser tests, parallelism, batched shell probes, in-process helper, lazy imports) with estimated speedups and complexity tradeoffs. Define a recommended sequence for implementing optimizations and a checklist for verification and re-profiling.	docs/guides/test-suite-performance.md
Remove the outdated skillset comparison guide.	Delete obsolete documentation comparing skillset to other tools or prior behavior (exact prior content removed).	docs/guides/skillset-comparison.md

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[sourcery-ai]

Hey - I've reviewed your changes and they look great!

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