Fix CI: use platform-specific features instead of --all-features

The accelerate feature is macOS-only, so --all-features fails on Linux CI.
Use explicit features "npy,openblas" for lint and docs jobs on Ubuntu.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: raphaelsty

.github/workflows/ci.yml

@@ -108,8 +108,8 @@ jobs:
       - name: Clippy (default features)
         run: cargo clippy --all-targets -- -D warnings
 
-      - name: Clippy (all features)
-        run: cargo clippy --all-targets --all-features -- -D warnings
+      - name: Clippy (with BLAS)
+        run: cargo clippy --all-targets --features "npy,openblas" -- -D warnings
 
   docs:
     name: Documentation
@@ -124,7 +124,7 @@ jobs:
         run: sudo apt-get update && sudo apt-get install -y libopenblas-dev
 
       - name: Build documentation
-        run: cargo doc --no-deps --all-features
+        run: cargo doc --no-deps --features "npy,openblas"
         env:
           RUSTDOCFLAGS: -D warnings