feat(api): REST API with OpenAPI for other apps, behind Pireon OAuth

A REST adapter next to GraphQL (presenters/http) that calls the same
application services, so validation, permissions and domain errors are the
same: projects (members, board, stats, activity), issues (search, workflow,
assignee, release, links, comments, history), comments, releases and users.
Projects and issues can be addressed by id or key (WEB, WEB-12).

- Swagger UI at /api/docs, document at /api/docs-json and apps/api/openapi.json
  (rewritten by `nx serve api`, like schema.gql) for client generation.
- Every route but health/auth/webhook needs a Pireon token: the document
  declares Pireon OAuth2 (authorization code + PKCE, password) through the
  /api/auth/token proxy, and a bearer scheme for apps with their own client.
- configureApp() shares main.ts setup with the e2e, which now also covers REST.
- SWAGGER_ENABLED / OPENAPI_FILE config; docs 03/05 and library READMEs.

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

libs/api/tracker/presenters/src/lib/tracker-presenters.module.ts

@@ -5,10 +5,26 @@ import { IssueResolver } from './graphql/issue.resolver';
 import { ProjectResolver } from './graphql/project.resolver';
 import { ReleaseResolver } from './graphql/release.resolver';
 import { SubscriptionResolver } from './graphql/subscription.resolver';
+import { CommentsController } from './http/comments.controller';
+import { IssuesController } from './http/issues.controller';
+import { ProjectsController } from './http/projects.controller';
+import { Refs } from './http/refs';
+import { ReleasesController } from './http/releases.controller';
 
-/** Driving adapters of the tracker context (GraphQL queries, mutations, subscriptions). */
+/**
+ * Driving adapters of the tracker context: GraphQL (queries, mutations,
+ * subscriptions) and REST with OpenAPI for other apps. Both call the same
+ * application services.
+ */
 @Module({
+  controllers: [
+    ProjectsController,
+    IssuesController,
+    CommentsController,
+    ReleasesController,
+  ],
   providers: [
+    Refs,
     ProjectResolver,
     IssueResolver,
     CommentResolver,