Add plan execution mode, game ID, and version to health endpoint

- Add executionMode and gameId columns to StreamPlan schema
- Add migration for new columns
- Support executionMode/gameId in plan create and update endpoints
- Add version field to health check response from package.json

prisma/schema.prisma

@@ -54,14 +54,16 @@ model LinkedAccount {
 }
 
 model StreamPlan {
-  id           String              @id @default(uuid())
-  userId       String
-  user         User                @relation(fields: [userId], references: [id], onDelete: Cascade)
-  name         String
-  status       String              @default("DRAFT")
-  createdAt    DateTime            @default(now())
-  updatedAt    DateTime            @updatedAt
-  destinations StreamDestination[]
+  id            String              @id @default(uuid())
+  userId        String
+  user          User                @relation(fields: [userId], references: [id], onDelete: Cascade)
+  name          String
+  status        String              @default("DRAFT")
+  executionMode String              @default("IN_GAME")
+  gameId        String              @default("")
+  createdAt     DateTime            @default(now())
+  updatedAt     DateTime            @updatedAt
+  destinations  StreamDestination[]
 
   @@index([userId])
 }