[IMP] runbot_merge: auto-trigger cron for issue closing

Probably should create a mixin for this: when a model is used as a
task queue for a cron, the cron should automatically be triggered on
creation. Requiring an explicit trigger after a creation is error
prone and increase the risks that some of the triggers will be
forgotten/missed.

runbot_merge/models/crons/issues_closer.py

@@ -1,6 +1,6 @@
 import logging
 
-from odoo import models, fields
+from odoo import models, fields, api
 
 _logger = logging.getLogger(__name__)
 class BranchCleanup(models.Model):
@@ -10,6 +10,11 @@ class BranchCleanup(models.Model):
     repository_id = fields.Many2one('runbot_merge.repository', required=True)
     number = fields.Integer(required=True)
 
+    @api.model_create_multi
+    def create(self, vals_list):
+        self.env.ref('runbot_merge.issues_closer_cron')._trigger()
+        return super().create(vals_list)
+
     def _run(self):
         ghs = {}
         while t := self.search([], limit=1):

runbot_merge/models/pull_requests.py

@@ -2435,7 +2435,6 @@ class Stagings(models.Model):
                         })
                 if self.issues_to_close:
                     self.env['runbot_merge.issues_closer'].create(self.issues_to_close)
-                    self.env.ref('runbot_merge.issues_closer_cron')._trigger()
             finally:
                 self.write({'active': False})
         elif self.state == 'failure' or self.is_timed_out():