feat: round finalization with ranking-based outcomes + award pool notifications

- processRoundClose EVALUATION uses ranking scores + advanceMode config
  (threshold vs count) to auto-set proposedOutcome instead of defaulting all to PASSED
- Advancement emails generate invite tokens for passwordless users with
  "Create Your Account" CTA; rejection emails have no link
- Finalization UI shows account stats (invite vs dashboard link counts)
- Fixed getFinalizationSummary ranking query (was using non-existent rankingsJson)
- New award pool notification system: getAwardSelectionNotificationTemplate email,
  notifyEligibleProjects mutation with invite token generation,
  "Notify Pool" button on award detail page with custom message dialog

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

src/server/routers/mentor.ts

@@ -21,6 +21,7 @@ import {
   addFileComment as workspaceAddFileComment,
   promoteFile as workspacePromoteFile,
 } from '../services/mentor-workspace'
+import { triggerInProgressOnActivity } from '../services/round-engine'
 
 export const mentorRouter = router({
   /**
@@ -211,6 +212,23 @@ export const mentorRouter = router({
         },
       })
 
+      // Auto-transition: mark project IN_PROGRESS in any active MENTORING round
+      try {
+        const mentoringPrs = await ctx.prisma.projectRoundState.findFirst({
+          where: {
+            projectId: input.projectId,
+            round: { roundType: 'MENTORING', status: { in: ['ROUND_ACTIVE', 'ROUND_CLOSED'] } },
+            state: 'PENDING',
+          },
+          select: { roundId: true },
+        })
+        if (mentoringPrs) {
+          await triggerInProgressOnActivity(input.projectId, mentoringPrs.roundId, ctx.user.id, ctx.prisma)
+        }
+      } catch (e) {
+        console.error('[Mentor] triggerInProgressOnActivity failed (non-fatal):', e)
+      }
+
       return assignment
     }),