Function headerOrderSimilarity

headerOrderSimilarity(a: string[], b: string[]): number
Compute a Jaccard-based order similarity between two header-name sequences.

This combines:
1. Set similarity (Jaccard): are the same headers present?
2. Order similarity: is the relative order of common headers preserved?
Parameters
- a: string[]
  Reference header order.
- b: string[]
  Incoming header order.
Returns number
Blended score in [0, 1].
- Defined in src/libs/extractors/headers.ts:91