docs: update build performance benchmarks (2.5.0)

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Automated build benchmark update for 2.5.0 from workflow run #83.

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Greptile Summary

Automated benchmark update for version 2.5.0 that adds comprehensive performance data comparing native Rust and WASM engines. The update shows significant improvements in native build performance (2 ms/file vs previous 5.1 ms/file WASM-only metric) and adds new build phase breakdown metrics. All data is consistent between README.md and BUILD-BENCHMARKS.md.

Confidence Score: 5/5

• This automated benchmark update is safe to merge with no risk
• Documentation-only change with consistent, properly formatted performance data across both files. No code changes or logic modifications.
• No files require special attention

Important Files Changed

Filename	Overview
README.md	Updated performance metrics to show separate native (2 ms/file) and WASM (8.4 ms/file) benchmarks for v2.5.0, added path query metric
generated/BUILD-BENCHMARKS.md	Added comprehensive v2.5.0 benchmark data with native/WASM comparison, new build phase breakdown section, and updated all metric tables

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