Bounded buffer simulation

Simulate a deterministic bounded-buffer producer/consumer over a sequence of operations. You are given `ops`, a list of strings each either 'P' (produce) or 'C' (consume), and an integer `cap` (buffer capacity). Process ops left to right maintaining a current item count: a 'P' succeeds (count += 1) only if count < cap, otherwise it is a DROPPED produce; a 'C' succeeds (count -= 1) only if count > 0, otherwise it is a STARVED consume. Return a list [produced, consumed, dropped, starved] tallying how many of each outcome occurred.