fix: resolve vite binary regardless of npm hoisting in Docker build

Fix production stage: copy api/node_modules from deps

Fix Dockerfile: copy workspace-local node_modules for nest and vite

Rewrite Dockerfile: single deps stage, direct binary builds

Add python3/make/g++ to api-builder stage for better-sqlite3

Fix Dockerfile for npm workspaces — use root lock file

Add GitHub Actions CI/CD, HF Space deployment, market hours guard, and static serving