Phase 4a of the BTE refactor (audit 2026-05-24 §3 V). svrnty-vision is a
sovereign HTTP gateway in front of four vision capabilities — VLM (Spark 2
Qwen3-VL), FLUX image gen (Spark 1 ComfyUI), palette extraction, and
background removal. This commit lays only the scaffold: FastAPI app,
/healthz, four 501-stub routers, pydantic-settings config, pytest smoke.
Real implementations land in Phase 4b. BTE code is untouched in 4a.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
