Drops the comfyui, downloader-comfyui, open-webui, lazytainer and neo4j
services with their volumes, env keys and update.sh steps, plus
scripts/switch-model.sh and the two image-generation research docs.
Refs #55 (removal inventory #58, intent vs. source #63)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>