카테고리 관련 DB 테이블 추가

src/lib/server/db/schema/category.ts

@@ -0,0 +1,52 @@
+import {
+  sqliteTable,
+  text,
+  integer,
+  foreignKey,
+  type AnySQLiteColumn,
+} from "drizzle-orm/sqlite-core";
+import { mek } from "./mek";
+import { user } from "./user";
+
+const ciphertext = (name: string) =>
+  text(name, { mode: "json" }).$type<{
+    ciphertext: string; // Base64
+    iv: string; // Base64
+  }>();
+
+export const category = sqliteTable(
+  "category",
+  {
+    id: integer("id").primaryKey({ autoIncrement: true }),
+    parentId: integer("parent_id").references((): AnySQLiteColumn => category.id, {
+      onDelete: "cascade",
+    }),
+    userId: integer("user_id")
+      .notNull()
+      .references(() => user.id),
+    mekVersion: integer("master_encryption_key_version").notNull(),
+    encDek: text("encrypted_data_encryption_key").notNull().unique(), // Base64
+    dekVersion: integer("data_encryption_key_version", { mode: "timestamp_ms" }).notNull(),
+    encName: ciphertext("encrypted_name").notNull(),
+  },
+  (t) => ({
+    ref1: foreignKey({
+      columns: [t.parentId],
+      foreignColumns: [t.id],
+    }),
+    ref2: foreignKey({
+      columns: [t.userId, t.mekVersion],
+      foreignColumns: [mek.userId, mek.version],
+    }),
+  }),
+);
+
+export const categoryLog = sqliteTable("category_log", {
+  id: integer("id").primaryKey({ autoIncrement: true }),
+  categoryId: integer("category_id")
+    .notNull()
+    .references(() => category.id, { onDelete: "cascade" }),
+  timestamp: integer("timestamp", { mode: "timestamp_ms" }).notNull(),
+  action: text("action", { enum: ["create", "rename"] }).notNull(),
+  newName: ciphertext("new_name"),
+});