autoincrement

Atomically increments a Redis-backed counter named by the key pin (namespaced per entity, with a separate counter for simulation runs) and outputs the new integer value. When the counter is missing or below initial_number it is first reset to initial_number (clamped to >= 0) and then incremented, so the first call outputs initial_number + 1. Outputs 0 when key is empty or Redis is unavailable; a wired expiry pin sets the counter TTL in seconds.