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/persistence/manager.go

@@ -1,6 +1,7 @@
 package persistence
 
 import (
+	"context"
 	"fmt"
 	"net/http"
 	"time"
@@ -90,3 +91,8 @@ func (m *Manager) Clear(rw http.ResponseWriter, req *http.Request) error {
 		return m.Store.Clear(req.Context(), key)
 	})
 }
+
+// VerifyConnection validates the underlying store is ready and connected
+func (m *Manager) VerifyConnection(ctx context.Context) error {
+	return m.Store.VerifyConnection(ctx)
+}