docs: update build performance benchmarks (3.0.1)

[github-actions]

Automated build benchmark update for 3.0.1 from workflow run #190.

[greptile-apps]

Greptile Summary

Automated benchmark update for v3.0.1 correctly documents the expected performance impact of enabling --cfg and --dataflow by default (per PR #312). Build times increased 2-3x as the system now extracts control flow graphs and dataflow edges on every build, but this provides significantly more analysis capabilities.

• Native build speed: 4.4 → 14.1 ms/file (220% increase)
• WASM build speed: 13.7 → 24.4 ms/file (78% increase)
• Nodes extracted per file increased 43% (native) due to additional CFG and dataflow data
• All percentage calculations and cross-table metrics are mathematically consistent
• Raw JSON data matches all computed per-file metrics

The performance regression is intentional and documented in CHANGELOG.md - users who don't need CFG/dataflow can use the new --no-cfg and --no-dataflow flags added in PR #317.

Confidence Score: 5/5

• This automated benchmark update is safe to merge with no risk
• This is a fully automated documentation update with accurate benchmark data that correctly reflects the expected performance impact of enabling CFG and dataflow analysis by default. All metrics are internally consistent and calculations verified.
• No files require special attention

Important Files Changed

Filename	Overview
README.md	Updated performance benchmark table with 3.0.1 metrics showing expected slowdown due to CFG/dataflow being enabled by default
generated/benchmarks/BUILD-BENCHMARKS.md	Added comprehensive 3.0.1 benchmark data across all tables with accurate percentage calculations and raw metrics

_{Last reviewed commit: 38711f9}