feat: schedule next airing episode

happens when new title is saved, or when new episode internal route is run successfully

src/models/schema.ts

@@ -34,4 +34,20 @@ export const keyValueTable = sqliteTable("key_value", {
   value: text("value").notNull(),
 });
 
-export const tables = [watchStatusTable, deviceTokensTable, keyValueTable];
+export const titleMessagesTable = sqliteTable(
+  "title_messages",
+  {
+    titleId: integer("title_id").notNull(),
+    messageId: text("message_id").notNull(),
+  },
+  (table) => ({
+    pk: primaryKey({ columns: [table.titleId, table.messageId] }),
+  }),
+);
+
+export const tables = [
+  watchStatusTable,
+  deviceTokensTable,
+  keyValueTable,
+  titleMessagesTable,
+];