Added middleware to modify porecess details response and replace the callback...

Added middleware to modify porecess details response and replace the callback result with a URl, and Implemented get callback result by step-id endpoint.

gso/api/v1/__init__.py

@@ -3,9 +3,11 @@
 from fastapi import APIRouter
 
 from gso.api.v1.imports import router as imports_router
+from gso.api.v1.processes import router as processes_router
 from gso.api.v1.subscriptions import router as subscriptions_router
 
 router = APIRouter()
 
 router.include_router(imports_router)
 router.include_router(subscriptions_router)
+router.include_router(processes_router)