Competition/Round architecture: full platform rewrite (Phases 1-9)

Replace Pipeline/Stage system with Competition/Round architecture.
New schema: Competition, Round (7 types), JuryGroup, AssignmentPolicy,
ProjectRoundState, DeliberationSession, ResultLock, SubmissionWindow.
New services: round-engine, round-assignment, deliberation, result-lock,
submission-manager, competition-context, ai-prompt-guard.
Full admin/jury/applicant/mentor UI rewrite. AI prompt hardening with
structured prompts, retry logic, and injection detection. All legacy
pipeline/stage code removed. 4 new migrations + seed aligned.

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

next.config.ts

@@ -15,6 +15,41 @@ const nextConfig: NextConfig = {
       },
     ],
   },
+  async redirects() {
+    return [
+      // Legacy Pipeline/Stage routes → Competition/Round routes
+      {
+        source: '/admin/rounds/pipelines',
+        destination: '/admin/competitions',
+        permanent: true,
+      },
+      {
+        source: '/admin/rounds/pipeline/:path*',
+        destination: '/admin/competitions',
+        permanent: true,
+      },
+      {
+        source: '/jury/stages',
+        destination: '/jury/competitions',
+        permanent: true,
+      },
+      {
+        source: '/jury/stages/:path*',
+        destination: '/jury/competitions',
+        permanent: true,
+      },
+      {
+        source: '/applicant/pipeline',
+        destination: '/applicant/competitions',
+        permanent: true,
+      },
+      {
+        source: '/applicant/pipeline/:path*',
+        destination: '/applicant/competitions',
+        permanent: true,
+      },
+    ]
+  },
 }
 
 export default nextConfig