SDP mesh functions

• Externalized update_sdp_mesh_dry and _real into workflow_steps
• Added _update_sdp_single_pe into workflow_steps
• Added necessary imports

gso/utils/workflow_steps.py

@@ -56,6 +56,9 @@ def _update_sdp_mesh(
     inventory = generate_inventory_for_active_routers(
         router_role=RouterRole.PE, router_vendor=Vendor.NOKIA, exclude_routers=[subscription["router"]["router_fqdn"]]
     )
+    if len(inventory["all"]["hosts"].keys()) == 0:
+        return  # Skip this Ansible interaction if the inventory is empty.
+
     extra_vars = {
         "dry_run": dry_run,
         "subscription": subscription,