merge: unify lab-org repo history with the deploy repo

feat: LLM-generated construct items (design note ITEM_GENERATION.md)

chore: script to fix PsyEmbedding HF repos' missing 1_Pooling config

Upload limits: make the byte ceiling configurable and stream-checked

Sync platform from lab mainline: dev instance ready to deploy

feat: upload tiers with placeholder sign-in, project archive/delete, no-em-dash rule

Initialize CCR Platform mainline (Culture and Morality Lab)

CCR Platform: web platform for Contextualized Construct Representations