Seed all CSV entries, fix category mapping, add duplicate detection in filtering

- Remove isValidEntry filter from seed: all 214 CSV rows are now seeded
  (Ignore/Doublon/test entries included for AI screening to handle)
- Fix category mapping: normalize non-breaking spaces (U+00A0) that
  caused all categories to map to null
- Add built-in duplicate submission detection in stage-filtering that
  groups projects by submitter email and always flags (never auto-rejects)
  so admin must review
- AI screening runs for duplicates even if deterministic rules fail,
  with sibling project metadata attached for admin context
- Update Candidatures2026.csv with expanded team list
- Simplify routing to award assignment (migration + schema cleanup)

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

prisma/migrations/20260211000000_add_file_requirements/migration.sql

@@ -1,30 +1,30 @@
--- CreateTable
-CREATE TABLE "FileRequirement" (
-    "id" TEXT NOT NULL,
-    "roundId" TEXT NOT NULL,
-    "name" TEXT NOT NULL,
-    "description" TEXT,
-    "acceptedMimeTypes" TEXT[],
-    "maxSizeMB" INTEGER,
-    "isRequired" BOOLEAN NOT NULL DEFAULT true,
-    "sortOrder" INTEGER NOT NULL DEFAULT 0,
-    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
-    "updatedAt" TIMESTAMP(3) NOT NULL,
-
-    CONSTRAINT "FileRequirement_pkey" PRIMARY KEY ("id")
-);
-
--- CreateIndex
-CREATE INDEX "FileRequirement_roundId_idx" ON "FileRequirement"("roundId");
-
--- AddForeignKey
-ALTER TABLE "FileRequirement" ADD CONSTRAINT "FileRequirement_roundId_fkey" FOREIGN KEY ("roundId") REFERENCES "Round"("id") ON DELETE CASCADE ON UPDATE CASCADE;
-
--- AlterTable: add requirementId to ProjectFile
-ALTER TABLE "ProjectFile" ADD COLUMN "requirementId" TEXT;
-
--- CreateIndex
-CREATE INDEX "ProjectFile_requirementId_idx" ON "ProjectFile"("requirementId");
-
--- AddForeignKey
-ALTER TABLE "ProjectFile" ADD CONSTRAINT "ProjectFile_requirementId_fkey" FOREIGN KEY ("requirementId") REFERENCES "FileRequirement"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+-- CreateTable
+CREATE TABLE "FileRequirement" (
+    "id" TEXT NOT NULL,
+    "roundId" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "description" TEXT,
+    "acceptedMimeTypes" TEXT[],
+    "maxSizeMB" INTEGER,
+    "isRequired" BOOLEAN NOT NULL DEFAULT true,
+    "sortOrder" INTEGER NOT NULL DEFAULT 0,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "FileRequirement_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "FileRequirement_roundId_idx" ON "FileRequirement"("roundId");
+
+-- AddForeignKey
+ALTER TABLE "FileRequirement" ADD CONSTRAINT "FileRequirement_roundId_fkey" FOREIGN KEY ("roundId") REFERENCES "Round"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AlterTable: add requirementId to ProjectFile
+ALTER TABLE "ProjectFile" ADD COLUMN "requirementId" TEXT;
+
+-- CreateIndex
+CREATE INDEX "ProjectFile_requirementId_idx" ON "ProjectFile"("requirementId");
+
+-- AddForeignKey
+ALTER TABLE "ProjectFile" ADD CONSTRAINT "ProjectFile_requirementId_fkey" FOREIGN KEY ("requirementId") REFERENCES "FileRequirement"("id") ON DELETE SET NULL ON UPDATE CASCADE;