fix(freeradius): return the created entry's remote id from create_radius_*

add_client/add_user's response carries no id, so create_radius_client()
and create_radius_user() now look the new entry up via
get_radius_clients()/get_radius_users() (matched by name/username)
immediately after creation. Callers need this id to address the entry in
later set_*/del_* calls -- without it there was no way to store a
reference to what was just created.

tests/unit/test_driver.py

@@ -1175,11 +1175,17 @@ class TestGetRadiusClients:
 
 
 class TestCreateRadiusClient:
-    def test_success_reconfigures_service(self, driver):
+    def test_success_returns_remote_id(self, driver):
+        driver._post = lambda path, data=None: {"result": "saved"}
+        driver._get = lambda path: RADIUS_CLIENTS_RESPONSE
+        result = driver.create_radius_client("ap-lobby", "10.0.0.5/32", "s3cr3t")
+        assert result == {"success": True, "id": "e5483f1b-936b-47ba-8cca-24d56ad643c6"}
+
+    def test_success_calls_add_then_reconfigure(self, driver):
         calls = []
         driver._post = lambda path, data=None: calls.append((path, data)) or {"result": "saved"}
-        result = driver.create_radius_client("ap-lobby", "10.0.0.5/32", "s3cr3t")
-        assert result == {"success": True}
+        driver._get = lambda path: RADIUS_CLIENTS_RESPONSE
+        driver.create_radius_client("ap-lobby", "10.0.0.5/32", "s3cr3t")
         assert calls[0] == (
             "/api/freeradius/client/add_client",
             {"client": {"name": "ap-lobby", "ip": "10.0.0.5/32", "secret": "s3cr3t"}},
@@ -1197,6 +1203,12 @@ class TestCreateRadiusClient:
         assert result["validations"] == {"client.name": "A value is required."}
         assert calls == ["/api/freeradius/client/add_client"]
 
+    def test_created_entry_not_found_after_add_returns_no_id(self, driver):
+        driver._post = lambda path, data=None: {"result": "saved"}
+        driver._get = lambda path: {"rows": []}
+        result = driver.create_radius_client("ap-lobby", "10.0.0.5/32", "s3cr3t")
+        assert result == {"success": True, "id": None}
+
 
 class TestDeleteRadiusClient:
     def test_success_reconfigures_service(self, driver):
@@ -1246,11 +1258,17 @@ class TestGetRadiusUsers:
 
 
 class TestCreateRadiusUser:
-    def test_success_reconfigures_service(self, driver):
+    def test_success_returns_remote_id(self, driver):
+        driver._post = lambda path, data=None: {"result": "saved"}
+        driver._get = lambda path: RADIUS_USERS_RESPONSE
+        result = driver.create_radius_user("jdoe", "hunter2")
+        assert result == {"success": True, "id": "71da23fd-03f3-4e1f-a7e1-bb25645b981e"}
+
+    def test_success_calls_add_then_reconfigure(self, driver):
         calls = []
         driver._post = lambda path, data=None: calls.append((path, data)) or {"result": "saved"}
-        result = driver.create_radius_user("jdoe", "hunter2")
-        assert result == {"success": True}
+        driver._get = lambda path: RADIUS_USERS_RESPONSE
+        driver.create_radius_user("jdoe", "hunter2")
         assert calls[0] == (
             "/api/freeradius/user/add_user",
             {"user": {"username": "jdoe", "password": "hunter2"}},
@@ -1267,6 +1285,12 @@ class TestCreateRadiusUser:
         assert result["success"] is False
         assert calls == ["/api/freeradius/user/add_user"]
 
+    def test_created_entry_not_found_after_add_returns_no_id(self, driver):
+        driver._post = lambda path, data=None: {"result": "saved"}
+        driver._get = lambda path: {"rows": []}
+        result = driver.create_radius_user("jdoe", "hunter2")
+        assert result == {"success": True, "id": None}
+
 
 class TestDeleteRadiusUser:
     def test_success_reconfigures_service(self, driver):