test: fix ComfyUI prompt builder dependencies

[catcherintheroad-hub]

Summary

• declare lodash as a runtime app dependency because the ComfyUI provider imports lodash/unionBy and the form settings import lodash/debounce
• import the ComfyUI graph, input id enum, and workflow prompt helpers in createPromptBuilder.spec.ts so the focused ComfyUI prompt builder test can run on main

Validation

• PATH=/opt/homebrew/opt/node@22/bin:$PATH bun run --cwd packages/app test:unit:ci -- src/app/api/resolve/providers/comfyui/createPromptBuilder.spec.ts

This is a small support patch for the ComfyUI workflow work around #5 / #144; it unblocks the existing focused prompt builder coverage without changing runtime behavior.