Breakpoint Orchestration overview

Breakpoint Orchestration as a cross-cutting topic - human-in-the-loop patterns for incorporating human judgment into automated agent workflows. Covers breakpoint placement strategy (sparse by default, dense when requirements are ambiguous), auto-approval rules for low-risk operations, rejection loops where breakpoint feedback is incorporated and the task retried, breakpoint routing to domain experts for specialized decisions, and the spectrum from fully-automated (yolo mode) to maximally-supervised execution. Breakpoints are first-class effects in the Babysitter SDK requested via ctx.breakpoint().