Server: Add health check route (#26999)

* Server: Add health check route

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

* Server: Remove health check middleware

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

pkg/services/sqlstore/datasource.go

@@ -32,7 +32,6 @@ func GetDataSourceById(query *models.GetDataSourceByIdQuery) error {
 
 	datasource := models.DataSource{OrgId: query.OrgId, Id: query.Id}
 	has, err := x.Get(&datasource)
-
 	if err != nil {
 		return err
 	}

pkg/services/sqlstore/session.go

@@ -52,6 +52,7 @@ func (ss *SqlStore) WithDbSession(ctx context.Context, callback dbTransactionFun
 	if err != nil {
 		return err
 	}
+	defer sess.Close()
 
 	return callback(sess)
 }

pkg/services/sqlstore/transactions.go

@@ -11,7 +11,7 @@ import (
 	"xorm.io/xorm"
 )
 
-// WithTransactionalDbSession calls the callback with an session within a transaction
+// WithTransactionalDbSession calls the callback with a session within a transaction.
 func (ss *SqlStore) WithTransactionalDbSession(ctx context.Context, callback dbTransactionFunc) error {
 	return inTransactionWithRetryCtx(ctx, ss.engine, callback, 0)
 }