feat(schema): add presetSettings join table

lib/db/schema/presetSettings.ts

@@ -0,0 +1,25 @@
+import { jsonb, pgTable, text, timestamp, unique } from "drizzle-orm/pg-core"
+import { communityPresets } from "./communityPresets"
+import { settingDefinitions } from "./settingDefinitions"
+
+export const presetSettings = pgTable(
+  "preset_settings",
+  {
+    id: text("id")
+      .primaryKey()
+      .$defaultFn(() => crypto.randomUUID()),
+    presetId: text("preset_id")
+      .notNull()
+      .references(() => communityPresets.id, { onDelete: "cascade" }),
+    settingDefinitionId: text("setting_definition_id")
+      .notNull()
+      .references(() => settingDefinitions.id, { onDelete: "cascade" }),
+    // Value stored as JSON — boolean for toggle, string for select,
+    // number for range/number
+    value: jsonb("value").notNull().$type<boolean | string | number>(),
+    createdAt: timestamp("created_at").defaultNow().notNull(),
+  },
+  (table) => [
+    unique("preset_setting_unique").on(table.presetId, table.settingDefinitionId),
+  ],
+)