Brummel
292c95756f
Add a typed-handle GraphBuilder authoring surface for blueprint topology: node references become Copy NodeHandle values, ports/fields resolve by name against the existing PortSpec.name/FieldSpec.name at a single fallible build() terminal, lowering to the unchanged index-wired Composite (C23 holds by construction — names never reach the compilat, mirroring param-name resolution). Spec auto-signed under /boss: all objective gates green (precondition, self-review, grounding-check PASS) and a unanimous five-lens spec-skeptic panel (criterion, grounding, scope-fork, ambiguity, plan-readiness all SOUND). The structural close of the SimBroker exposure/price swap (#21) is explicitly out of scope, tracked as #65. refs #64