feat(fingerprint): orthogonal(), or(), bundle(), chunks_u64x8/u8x64

Adds missing BindSpace API methods:
  orthogonal(seed) — golden-ratio-seeded quasi-orthogonal fingerprint
  or() — bitwise OR
  bundle(&[&Self]) — majority vote across multiple fingerprints
  chunks_u64x8() — iterate as 8-word batches for AVX-512 VPOPCNTDQ
  chunks_u8x64() — iterate as 64-byte batches for U8x64 ops

https://claude.ai/code/session_01SbYsmmbPf9YQuYbHZN52Zh

Author: claude

src/hpc/fingerprint.rs

@@ -223,6 +223,20 @@ impl<const N: usize> Fingerprint<N> {
         Self { words: result }
     }
 
+    /// Create a quasi-orthogonal fingerprint from a seed.
+    /// Uses golden-ratio-multiplied seeds to ensure near-orthogonality.
+    pub fn orthogonal(seed: u64) -> Self {
+        Self::random(seed.wrapping_mul(0x9E3779B97F4A7C15))
+    }
+
+    /// Bitwise OR.
+    #[inline]
+    pub fn or(&self, other: &Self) -> Self {
+        let mut words = [0u64; N];
+        for i in 0..N { words[i] = self.words[i] | other.words[i]; }
+        Self { words }
+    }
+
     /// Create from content string (SHA-256-like hash expansion).
     pub fn from_content(data: &str) -> Self {
         let mut h = 0x736f6d6570736575u64;