feat: alerts open bugs, and repeats of the same problem go to that bug

Owners and admins turn on a secret URL per project (Settings →
Integrations), POST /api/webhooks/alerts/{project}/{token}, that Sentry,
Uptime Kuma, Prometheus Alertmanager, Grafana or any tool sending JSON
with a title can call. A new problem opens a bug as TaskStream (label
«alerta», chosen type and priority); while that bug is open, the same
fingerprint goes to it (a comment at most every 30 minutes) and
«resolved» is said on it; once it is closed, a new bug names the old
one. Alerts of a project are handled one at a time, so two at once open
one bug, and a bug not yet projected still counts as open. Unknown
project, alerts off or a bad token all answer 403.

TaskStream may now comment as the system actor, like it already opened
tickets for public proposals. Stored in Mongo (alert_integrations,
alert_traces), not in the event store.

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

libs/web/tracker/domain/src/lib/models/models.ts

@@ -316,6 +316,16 @@ export interface GitIntegration {
   repositories: GitRepository[];
 }
 
+/** Alerts → bugs: the secret URL monitoring tools call. */
+export interface AlertIntegration {
+  enabled: boolean;
+  /** With its secret token; only for owners and admins. */
+  webhookPath: string | null;
+  /** Ticket type it opens; null: the project's first bug type. */
+  typeId: string | null;
+  priority: IssuePriority;
+}
+
 export interface Comment {
   id: string;
   issueId: string;