v2.1.44 ships standard Bun binary instead of baseline (AVX warning regression)

Description

Starting with Claude Code v2.1.44, the bundled Bun binary requires AVX CPU support. Previous versions (tested v2.1.42) shipped the baseline build and worked without warnings on non-AVX CPUs.

Reproduction

On a machine without AVX support (e.g., hw.optional.avx1_0: 0):

$ /Users/<user>/.local/share/claude/versions/2.1.42 --version
2.1.42 (Claude Code)

$ /Users/<user>/.local/share/claude/versions/2.1.44 --version
warn: CPU lacks AVX support, strange crashes may occur. Reinstall Bun or use *-baseline build:
  https://github.com/oven-sh/bun/releases/download/bun-v1.3.9/bun-darwin-x64-baseline.zip
2.1.44 (Claude Code)

v2.1.42 — no warning. v2.1.44 — warning appears.

Expected behavior

Claude Code should ship the bun-darwin-x64-baseline binary (or detect and select the correct one at install time) so it works on CPUs without AVX.

Environment

• macOS (Darwin 24.6.0), x86_64
• CPU AVX flags all 0
• Claude Code v2.1.44 via ~/.local/share/claude/versions/