Projektarten: T16 Versuchszähler je Mail (R7)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

server/services/repoAssignMail.js

@@ -33,6 +33,7 @@ export function shouldSendAssignMail(project, repo, { now = new Date(), createdN
 /** Erinnerung faellig: Mail ging vor >= 24 h, Art fehlt noch, noch keine Erinnerung. */
 export function dueReminder(project, { now = new Date() } = {}) {
   if (project?.kind || project?.assignReminderSentAt) return false
+  if (Number(project?.assignMailAttempts || 0) >= MAX_ATTEMPTS) return false
   const sent = time(project?.assignMailSentAt)
   if (sent === null) return false
   return new Date(now).getTime() - sent >= DAY_MS
@@ -73,6 +74,8 @@ export async function sendRepoAssignMail(project, { giteaLogin, reminder = false
       await updateDocument(config.collections.websiteProjects, project.$id, patch)
       return { sent: false, reason: err.message }
     }
+    // assignMailAttempts zaehlt die Versuche der aktuellen Mail: nach Erfolg zurueck auf 0 (R7)
+    patch.assignMailAttempts = 0
     patch[reminder ? 'assignReminderSentAt' : 'assignMailSentAt'] = new Date().toISOString()
     await updateDocument(config.collections.websiteProjects, project.$id, patch)
     return { sent: true }