Function compute_cache_namespace 

pub fn compute_cache_namespace(
    max_segment_tokens: usize,
    context_tokens: usize,
    profile: &str,
    batch_enabled: bool,
    prompt_version: &str,
    glossary_fingerprint: &str,
    style_fingerprint: &str,
    entities_fingerprint: &str,
) -> String

Compute a cache namespace that scopes lookups to a single set of schema and segmentation parameters. Cached rows from a different namespace are not eligible for reuse.

style_fingerprint and entities_fingerprint are opt-in mixins: pass an empty string to preserve cache compatibility with runs that didn’t use the feature; pass a non-empty fingerprint when the rendered prompt actually changes. The two slots use distinct domain separators so a style fingerprint can never collide with an entity fingerprint of the same content.