Release v2.26.4

Release: v2.26.4 [skip ci]

Patch

• Fix: Treat a zero integer dot product as orthogonal (295485b)
• Fix: Keep cosine reductions visible to OpenMP (f167681)
• Fix: Reindex keys after compact permutes slots (0a4baa6)
• Docs: Broaden the integration list and make the examples runnable (0fd2f32)
• Fix: Count binary dimensions in Python exact search (0a99f33)
• Docs: Use ScalarKind::B1 and mark the buffer view unsafe (a692bfc)