test: Added BodySection/BodySubSection schema models, changed Synthesiz…

- "backend/pipeline/schemas.py"
- "backend/pipeline/citation_utils.py"
- "backend/pipeline/test_citation_utils.py"

GSD-Task: S01/T01

.gsd/STATE.md

@@ -1,30 +0,0 @@
-# GSD State
-
-**Active Milestone:** M013: M013:
-**Active Slice:** None
-**Phase:** complete
-**Requirements Status:** 0 active · 0 validated · 0 deferred · 0 out of scope
-
-## Milestone Registry
-- ✅ **M001:** Chrysopedia Foundation — Infrastructure, Pipeline Core, and Skeleton UI
-- ✅ **M002:** M002:
-- ✅ **M003:** M003:
-- ✅ **M004:** M004:
-- ✅ **M005:** M005:
-- ✅ **M006:** M006:
-- ✅ **M007:** M007:
-- ✅ **M008:** M008:
-- ✅ **M009:** Homepage & First Impression
-- ✅ **M010:** Discovery, Navigation & Visual Identity
-- ✅ **M011:** M011:
-- ✅ **M012:** M012:
-- ✅ **M013:** M013:
-
-## Recent Decisions
-- None recorded
-
-## Blockers
-- None
-
-## Next Action
-All milestones complete.