Function apply_redundancy_drop 

pub fn apply_redundancy_drop(value: Value) -> Value

Apply the view-only redundancy-reduction pre-pass (ADR-078 §7) to a value.

Applies at most ONE pass over the value. This function is the canonical entry for the pre-pass; the per-record logic lives in drop_record.

Applied only when format ∈ {auto, table} AND presentation ≠ Verbose. Callers are responsible for checking those conditions; this function applies unconditionally.