fix: comprehensive repo audit — 15 issues fixed

fix: Sprint 6 — CLAUDE.md endpoint sync, UncertaintyConfig validator, annotation docs

refactor: Sprint 3b — remove dead code, non-functional provider, unused fields

feat(schemas): IIIF-native Sprint 1 — schema evolution for streaming architecture

fix(sprint-f0): fondations — lazy imports, schémas conformes, pydantic-settings

feat: multi-provider dynamique — ajout Mistral/Pixtral, détection auto des providers

Sprint 2 Session B — Pipeline image : fetch IIIF + dérivé JPEG 1500px + thumbnail

Sprint 2 Session A — Couche providers Google AI (3 modes d'auth)

Sprint 1 — Setup initial : arborescence, schémas Pydantic, profils JSON, prompts, tests