feat: readiness check (#1839)

* feat: readiness check

* fix: no need for query param

* docs: add a note

* chore: move the readyness check to its own endpoint

* docs(cr): add godoc

Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>

pkg/sessions/tests/session_store_tests.go

@@ -485,6 +485,12 @@ func SessionStoreInterfaceTests(in *testInput) {
 			})
 		})
 	})
+
+	Context("when VerifyConnection is called", func() {
+		It("should return without an error", func() {
+			Expect(in.ss().VerifyConnection(in.request.Context())).ToNot(HaveOccurred())
+		})
+	})
 }
 
 func LoadSessionTests(in *testInput) {