add N8N_PROTOCOL=https and N8N_HOST — required for HF Spaces

delete all custom code — bare n8n only

Create Python venv at exact path n8n expects (.venv in @n8n/task-runner-python)

Fix: restore correct start.sh (was overwritten by mis-targeted upload)

Pre-create Python venv in start.sh + build diagnostic for venv path

Initial deploy: n8n with auth proxy and PostgreSQL