feat(core-api): compose dsrRouter + consentRouter into appRouter

Add @repo/core-dsr and @repo/core-consent as dependencies and wire
dsrRouter + consentRouter into appRouter via the existing router
composition pattern. Integration tests cover all eight procedures
(dsr.export, dsr.delete, dsr.rectify, dsr.restrict, consent.grant,
consent.withdraw, consent.isGranted, consent.getCategories) with auth
and response-shape assertions.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/core-api/package.json

@@ -15,6 +15,8 @@
   "dependencies": {
     "@repo/auth": "workspace:*",
     "@repo/blog": "workspace:*",
+    "@repo/core-consent": "workspace:*",
+    "@repo/core-dsr": "workspace:*",
     "@repo/core-shared": "workspace:*",
     "@repo/marketing-pages": "workspace:*",
     "@repo/media": "workspace:*",
@@ -26,6 +28,7 @@
     "@repo/core-testing": "workspace:*",
     "@repo/core-typescript": "workspace:*",
     "@types/node": "^22.0.0",
+    "@vitest/coverage-v8": "^3.0.0",
     "vitest": "^3.0.0"
   }
 }