v0.5.1-rc.1

What's Changed

• bench(firefox): cross-clone cache convergence — 119→2 diverging, 8.45× speedup by @jleni in #258
• deps: drop aws-lc-sys (use ring) — unblocks aarch64-pc-windows-msvc by @jleni in #257
• Use guppy for build intent discovery by @jleni in #262
• Unify e2e and benchmark scenarios by @jleni in #261
• Fix Windows full compiler path detection by @jleni in #264
• Use guppy crate order for prefetch planning by @jleni in #263
• Improve build report diagnostics by @jleni in #265
• chore: bump release to 0.5.1-rc.1 by @jleni in #266

Full Changelog: v0.5.0...v0.5.1-rc.1