Directly-Follows Graph (Rust)

Discovers a directly-follows graph from an event log: for every pair of activities that occur back-to-back within a case, the number of times it happens, plus per-case start/end activities and per-activity frequency. Promenade's first Promenade Compute plugin — the package also ships a wasm32-wasip1 build of the same algorithm, run through Wasmtime by a compute engine instead of a browser worker.