API contracts have been defined for schemas, operations, and role-based access rights.

API contracts have been defined for schemas, operations, and role-based access rights.

merge: integrate yana/backend/api contracts

refactor(backend): regroup photo and estimate endpoints

feat(backend): add secure defect photo storage API

refactor(backend): regroup photo and estimate endpoints

feat(backend): add secure defect photo storage API

merge: integrate yana/backend/api contracts

merge: integrate yana/backend/api contracts

feat(mvp): add end-to-end estimate pipeline with mock AI

feat(mvp): add end-to-end estimate pipeline with mock AI

merge: integrate repair request API

style(docs): remove trailing whitespace

feat(backend): implement repair request management API

feat(backend): implement repair request management API

merge: integrate backend/json contracts

add card-3

feat(docs): add integration contracts and examples for ML Service

add card-3

feat(docs): add integration contracts and examples for ML Service

Pull request 'kran_dev' (#1) from kran_dev into master

feat(ml_service): implement ML service core, RAG, calculation engine, and tests

feat(backend): add SQLAlchemy models and database sessions

docs(db): clarify SQL scenario test setup

feat(db): add v3.1 schema, demo seed and SQL tests