Rebrand Refuge->Fugee in docs; Codex model GPT-5.5

Add UNHCR source guideline PDFs (RAG provenance)

Add UNHCR guidelines RAG index

[data] Commit countries_enriched.json so the app/Space is ready without the pipeline

docs: add README.md (overview + how to run) and specs/ISSUES.md (gotchas log)

[T001-T016] Phase 0 — project setup: agent loop, state machine, Gradio skeleton