feat(FN-1732): document model scope hierarchy in README and storage docs
- Add Model System section to README.md with five-lane dual-scope overview - Add new global fields to docs/storage.md (8 *GlobalProvider/*GlobalModelId keys) - Add new project fields to docs/storage.md (defaultProviderOverride, defaultModelIdOverride, executionProvider, executionModelId) - Add scope isolation note clarifying *Global* keys are project-settings-exclusive - Note: docs/settings-reference.md already had complete Model Selection Hierarchy with all five lanes - All model lane hierarchy engine and dashboard changes already merged via fusion/fn-1678
This commit is contained in: