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>

coverage/summary.json

@@ -1,14 +1,14 @@
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