feat: initial backend store prototype

store/src/routes/node/node.schema.ts

@@ -0,0 +1,40 @@
+import {
+  customType,
+  integer,
+  json,
+  pgTable,
+  serial,
+  varchar,
+} from "drizzle-orm/pg-core";
+import { relations } from "drizzle-orm/relations";
+import { usersTable } from "../user/user.schema.ts";
+
+const bytea = customType<{
+  data: ArrayBuffer;
+  default: false;
+}>({
+  dataType() {
+    return "bytea";
+  },
+});
+
+export const nodeTable = pgTable("nodes", {
+  id: serial().primaryKey(),
+  userId: varchar().notNull(),
+  systemId: varchar().notNull(),
+  nodeId: varchar().notNull(),
+  content: bytea().notNull(),
+  definition: json().notNull(),
+  previous: integer(),
+});
+
+export const nodeRelations = relations(nodeTable, ({ one }) => ({
+  userId: one(usersTable, {
+    fields: [nodeTable.userId],
+    references: [usersTable.id],
+  }),
+  previous: one(nodeTable, {
+    fields: [nodeTable.previous],
+    references: [nodeTable.id],
+  }),
+}));