ci(musl): clarify why -crt-static is needed

vite-task ships as a NAPI module in vite+, and musl Node with native
modules links to musl libc dynamically, so we must match.

https://claude.ai/code/session_01R3RoGqPDBRtNa2NRg3SeBM

Author: claude

.github/workflows/ci.yml

@@ -146,6 +146,8 @@ jobs:
       # Alpine's cc is already musl-native, so no custom linker is needed.
       # Must mirror [build].rustflags and target rustflags from .cargo/config.toml
       # (RUSTFLAGS env var overrides both levels).
+      # -crt-static: vite-task is shipped as a NAPI module in vite+, and musl Node
+      # with native modules links to musl libc dynamically, so we must do the same.
       RUSTFLAGS: --cfg tokio_unstable -D warnings -C target-feature=-crt-static
     steps:
       - name: Install Alpine dependencies