chore: bump size similarity threshold to 90%

- Tighter filtering reduces false positive similar groups
- Regenerated orig_resized fixture to match new threshold

src/lib.rs

@@ -100,7 +100,7 @@ pub fn hamming(a: u64, b: u64) -> u32 {
     (a ^ b).count_ones()
 }
 pub fn find_duplicate_groups(entries: &[ImageEntry], hamming_threshold: u32) -> Vec<DuplicateGroup> {
-    find_duplicate_groups_with_size_ratio(entries, hamming_threshold, 0.80)
+    find_duplicate_groups_with_size_ratio(entries, hamming_threshold, 0.90)
 }
 
 pub fn find_duplicate_groups_with_size_ratio(