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/app/api/cron/process-grace-periods/route.ts

@@ -0,0 +1,47 @@
+import { NextResponse } from 'next/server'
+import type { NextRequest } from 'next/server'
+import { prisma } from '@/lib/prisma'
+import { processRoundClose } from '@/server/services/round-finalization'
+
+export async function GET(request: NextRequest): Promise<NextResponse> {
+  const cronSecret = request.headers.get('x-cron-secret')
+
+  if (!cronSecret || cronSecret !== process.env.CRON_SECRET) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
+  }
+
+  try {
+    const now = new Date()
+
+    // Find rounds with expired grace periods that haven't been finalized
+    const expiredRounds = await prisma.round.findMany({
+      where: {
+        status: 'ROUND_CLOSED',
+        gracePeriodEndsAt: { lt: now },
+        finalizedAt: null,
+      },
+      select: { id: true, name: true },
+    })
+
+    const results: Array<{ roundId: string; roundName: string; processed: number }> = []
+
+    for (const round of expiredRounds) {
+      try {
+        const result = await processRoundClose(round.id, 'system-cron', prisma)
+        results.push({ roundId: round.id, roundName: round.name, processed: result.processed })
+      } catch (err) {
+        console.error(`[Cron] processRoundClose failed for round ${round.id}:`, err)
+      }
+    }
+
+    return NextResponse.json({
+      ok: true,
+      processedRounds: results.length,
+      results,
+      timestamp: now.toISOString(),
+    })
+  } catch (error) {
+    console.error('Cron grace period processing failed:', error)
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 })
+  }
+}