Fix AI assignment errors and tag matching

- Add missing updatedAt column to AssignmentJob table
- Fix algorithmic assignment to use AI-assigned projectTags instead of raw CSV tags
- Add case-insensitive tag matching for better expertise matching
- Scores should now properly reflect tag matches between judges and projects

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

prisma/migrations/20260205210000_fix_assignment_job_updated_at/migration.sql

@@ -0,0 +1,11 @@
+-- Add missing updatedAt column to AssignmentJob table
+
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM information_schema.columns
+        WHERE table_name = 'AssignmentJob' AND column_name = 'updatedAt'
+    ) THEN
+        ALTER TABLE "AssignmentJob" ADD COLUMN "updatedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP;
+    END IF;
+END $$;