feat: link commits, branches and pull requests to tickets

A project can turn on a webhook for GitHub, Gitea or GitLab. Pushes and
pull or merge requests that name a ticket key show on that ticket under
Desarrollo, with the state of each pull request; the secret is shown and
rotated from the project settings.

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

libs/web/tracker/infrastructure/src/lib/adapters/graphql-git.gateway.ts

@@ -0,0 +1,32 @@
+import { inject, Injectable } from '@angular/core';
+import { GitGateway, GitIntegration } from '@task-stream/web/tracker/domain';
+import { map, Observable } from 'rxjs';
+import {
+  DisableGitIntegrationDocument,
+  EnableGitIntegrationDocument,
+  GitIntegrationDocument,
+} from '../graphql/generated';
+import { GraphqlOperations } from './graphql-operations';
+
+@Injectable()
+export class GraphqlGitGateway extends GitGateway {
+  private readonly gql = inject(GraphqlOperations);
+
+  integration(projectId: string): Observable<GitIntegration> {
+    return this.gql
+      .query(GitIntegrationDocument, { projectId })
+      .pipe(map((d) => d.gitIntegration));
+  }
+
+  enable(projectId: string): Observable<GitIntegration> {
+    return this.gql
+      .mutate(EnableGitIntegrationDocument, { projectId })
+      .pipe(map((d) => d.enableGitIntegration));
+  }
+
+  disable(projectId: string): Observable<void> {
+    return this.gql
+      .mutate(DisableGitIntegrationDocument, { projectId })
+      .pipe(map(() => undefined));
+  }
+}