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>

prisma/schema.prisma

@@ -2193,6 +2193,11 @@ model Round {
   submissionWindowId String?
   specialAwardId     String?
 
+  // Finalization
+  gracePeriodEndsAt DateTime?
+  finalizedAt       DateTime?
+  finalizedBy       String?
+
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
 
@@ -2237,13 +2242,14 @@ model Round {
 }
 
 model ProjectRoundState {
-  id           String                 @id @default(cuid())
-  projectId    String
-  roundId      String
-  state        ProjectRoundStateValue @default(PENDING)
-  enteredAt    DateTime               @default(now())
-  exitedAt     DateTime?
-  metadataJson Json?                  @db.JsonB
+  id              String                  @id @default(cuid())
+  projectId       String
+  roundId         String
+  state           ProjectRoundStateValue  @default(PENDING)
+  proposedOutcome ProjectRoundStateValue?
+  enteredAt       DateTime                @default(now())
+  exitedAt        DateTime?
+  metadataJson    Json?                   @db.JsonB
 
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt