Add bio field and enhance smart assignment with bio matching

- Add bio field to User model for judge/mentor profile descriptions
- Add bio step to onboarding wizard (optional step with 500 char limit)
- Enhance smart assignment to match judge bio against project description
  - Uses keyword extraction and Jaccard-like similarity scoring
  - Only applies if judge has a bio (no penalty for empty bio)
  - Max 15 points for bio match on top of existing scoring
- Fix geographic distribution query to use round relation for programId
- Update score breakdown: tags (40), bio (15), workload (25), country (15)

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

src/server/routers/analytics.ts

@@ -349,7 +349,7 @@ export const analyticsRouter = router({
     .query(async ({ ctx, input }) => {
       const where = input.roundId
         ? { roundId: input.roundId }
-        : { programId: input.programId }
+        : { round: { programId: input.programId } }
 
       const distribution = await ctx.prisma.project.groupBy({
         by: ['country'],