Fix import_projects: use password 12345 to match ensure_admin.py

Bump init flag to v3, fail on 0 projects, fix created counter

Use session auth instead of JWT/DRF token for project import

Handle empty token list: add _extract_token + POST /api/token/ to create

Fix token retrieval: use users_userprofile table + /api/token/ endpoint

Fix LS auth and data persistence for HF Space

Initial SAGA annotation Space: Label Studio + proxy, 19 projects