refactor: use serial as id instead of uuid

api/v1/openapi.yaml

@@ -546,8 +546,8 @@ components:
             - id
 
     TrainingID:
-      type: string
-      format: uuid
+      type: integer
+      minimum: 1
       x-go-type: training.TrainingID
       x-go-type-import:
         path: gitlab.mareshq.com/hq/yggdrasil/pkg/training
@@ -652,8 +652,8 @@ components:
             - id
 
     TrainingDateID:
-      type: string
-      format: uuid
+      type: integer
+      minimum: 1
       x-go-type: training.TrainingDateID
       x-go-type-import:
         path: gitlab.mareshq.com/hq/yggdrasil/pkg/training
@@ -705,8 +705,8 @@ components:
         - attended
 
     TrainingDateAttendeeID:
-      type: string
-      format: uuid
+      type: integer
+      minimum: 1
       x-go-type: training.TrainingDateAttendeeID
       x-go-type-import:
         path: gitlab.mareshq.com/hq/yggdrasil/pkg/training