Add distribution power summaries

src/db/schema/distribution-boards.ts

@@ -1,4 +1,4 @@
-import { sqliteTable, text } from "drizzle-orm/sqlite-core";
+import { real, sqliteTable, text } from "drizzle-orm/sqlite-core";
 import { floors } from "./floors.js";
 import { projects } from "./projects.js";
 import type { DistributionBoardSupplyType } from "../../shared/constants/distribution-board.js";
@@ -13,5 +13,8 @@ export const distributionBoards = sqliteTable("distribution_boards", {
     onDelete: "set null",
   }),
   supplyType: text("supply_type").$type<DistributionBoardSupplyType>(),
+  simultaneityFactor: real("simultaneity_factor")
+    .notNull()
+    .default(1),
 });