Chore: remove cf-worker (CF IPs also blocked by Instagram)

Fix: fast-fail on hosted URL fetch with clear error message

Feat: Cloudflare Worker relay for hosted Instagram URL fetch

Fix: URL fetch works on hosted via Instagram's embed/captioned endpoint

Feat: single Instagram URL extraction via CAPTION_PROXY_URL

HF: shorten Space short_description to <=60 chars

#17/#20: hosted smoke test + final docs (HF deploy code-complete)

#19: public-URL hardening

#18: extend guardrail test for client-geocode + set-coords

#16: verify hosted UI renders without Ollama

#15: optional GitHub→HF Space sync workflow

#14: HF Spaces setup/deploy doc

#13: HF Space metadata README

#12: bound multi-user concurrency on the shared container

HF deploy: container hosted-readiness + client-side geocoding (#8–#11)

Demarcate the two deployment modes + add guardrails, CLAUDE.md