feat: add import routes and ingestion service for project and scenario imports

main.py

@@ -16,6 +16,7 @@ from models import (
 )
 from routes.auth import router as auth_router
 from routes.dashboard import router as dashboard_router
+from routes.imports import router as imports_router
 from routes.projects import router as projects_router
 from routes.scenarios import router as scenarios_router
 from services.bootstrap import bootstrap_admin
@@ -61,6 +62,7 @@ async def ensure_admin_bootstrap() -> None:
 
 app.include_router(dashboard_router)
 app.include_router(auth_router)
+app.include_router(imports_router)
 app.include_router(projects_router)
 app.include_router(scenarios_router)