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/api/tracker/presenters/src/lib/http/dto/responses.dto.ts

@@ -136,6 +136,42 @@ export class ChecklistItemDto {
   @ApiProperty() done!: boolean;
 }
 
+export class DevLinkDto {
+  @ApiProperty({
+    enum: ['COMMIT', 'BRANCH', 'PULL_REQUEST'],
+    enumName: 'DevLinkKind',
+  })
+  kind!: string;
+  @ApiProperty() url!: string;
+  @ApiProperty() title!: string;
+  @ApiProperty({ description: 'Short SHA, branch or PR number' }) ref!: string;
+  @ApiProperty({
+    enum: ['OPEN', 'MERGED', 'CLOSED'],
+    enumName: 'DevLinkState',
+    nullable: true,
+  })
+  state!: string | null;
+  @ApiProperty({ example: 'gitea' }) provider!: string;
+  @ApiProperty({ type: String, nullable: true }) author!: string | null;
+  @ApiProperty({ format: 'date-time' }) at!: string;
+}
+
+export class GitIntegrationDto {
+  @ApiProperty() enabled!: boolean;
+  @ApiProperty({
+    type: String,
+    nullable: true,
+    description: 'Webhook secret; only owners and admins see it',
+  })
+  secret!: string | null;
+  @ApiProperty({ example: '/api/webhooks/git/3f2c…' }) webhookPath!: string;
+}
+
+export class GitDeliveryResultDto {
+  @ApiProperty({ description: 'Tickets that got something new' })
+  recorded!: number;
+}
+
 export class IssueParentDto {
   @ApiProperty({ format: 'uuid' }) id!: string;
   @ApiProperty({ example: 'WEB-3' }) key!: string;
@@ -206,6 +242,11 @@ export class IssueDto {
   })
   rank!: string;
   @ApiProperty({ type: [ChecklistItemDto] }) checklist!: ChecklistItemDto[];
+  @ApiProperty({
+    type: [DevLinkDto],
+    description: 'Commits, branches and pull requests that mention it',
+  })
+  devLinks!: DevLinkDto[];
   @ApiProperty() commentCount!: number;
   @ApiProperty({ format: 'date-time' }) createdAt!: string;
   @ApiProperty({ format: 'date-time' }) updatedAt!: string;