Mail deliverability dashboard: findings with fixes, DMARC report ingestion, alerts on regressions

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

mailegress.go

@@ -149,6 +149,7 @@ type mailEgressView struct {
 	Status      string           `json:"status"`
 	StatusKnown bool             `json:"statusKnown"`
 	Check       *model.MailCheck `json:"check,omitempty"`
+	Findings    []Finding        `json:"findings"` // the deliverability checklist, with fixes
 }
 
 // mailEgressViewsLocked lists an org's mail egress without secrets. Caller holds s.mu.
@@ -164,6 +165,10 @@ func (s *Server) mailEgressViewsLocked(orgID string) []mailEgressView {
 		if chk, ok := s.mailChecks[e.ID]; ok {
 			c := chk
 			v.Check = &c
+			v.Findings = s.mailEgressFindingsLocked(e, chk)
+		}
+		if v.Findings == nil {
+			v.Findings = []Finding{}
 		}
 		out = append(out, v)
 	}