Merge pull request 'fix: event model fix' (#21) from bugfix/mapper into master

Reviewed-on: https://hattori.ztsh.eu/iac/karl/pulls/21

src/karl/model/webhook.py

@@ -4,8 +4,9 @@ from bubus import BaseEvent
 
 
 class WoodpeckerEvent(BaseEvent):
-  _id: str
+  _id: int
   commit: str
+  ref: str
   message: str
-  started: str
+  started: int
   files: List[str]