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 $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM information_schema.columns
+        WHERE table_name = 'AssignmentJob' AND column_name = 'updatedAt'
+    ) THEN
+        ALTER TABLE "AssignmentJob" ADD COLUMN "updatedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP;
+    END IF;
+END $$;

src/server/routers/assignment.ts

@@ -613,6 +613,9 @@ export const assignmentRouter = router({
           id: true,
           title: true,
           tags: true,
+          projectTags: {
+            include: { tag: { select: { name: true } } },
+          },
           _count: { select: { assignments: true } },
         },
       })
@@ -656,13 +659,22 @@ export const assignmentRouter = router({
             const reasoning: string[] = []
             let score = 0
 
-            // Expertise match (35% weight)
-            const matchingTags = juror.expertiseTags.filter((tag) =>
-              project.tags.includes(tag)
+            // Expertise match (35% weight) - use AI-assigned projectTags if available
+            const projectTagNames = project.projectTags.map((pt) => pt.tag.name.toLowerCase())
+
+            // Match against AI-assigned tags first, fall back to raw tags
+            const matchingTags = projectTagNames.length > 0
+              ? juror.expertiseTags.filter((tag) =>
+                  projectTagNames.includes(tag.toLowerCase())
                 )
+              : juror.expertiseTags.filter((tag) =>
+                  project.tags.map((t) => t.toLowerCase()).includes(tag.toLowerCase())
+                )
+
+            const totalTags = projectTagNames.length > 0 ? projectTagNames.length : project.tags.length
             const expertiseScore =
               matchingTags.length > 0
-                ? matchingTags.length / Math.max(project.tags.length, 1)
+                ? matchingTags.length / Math.max(totalTags, 1)
                 : 0
             score += expertiseScore * 35
             if (matchingTags.length > 0) {