A directed edge in the memory graph (Track C1): from_unit_id -> to_unit_id
with a link_type and weight, scoped to a bank.
C1 populates semantic (pgvector kNN, weight = cosine similarity) and temporal
(event-time proximity, weight = time-decay) edges. caused_by and
entity are valid link types but not yet written.
Summary
Types
Functions
@spec link_types() :: [String.t()]