S5: onboarding → minne + smaksignaler (user_stated)

packages/database/src/schema/memory.ts

@@ -6,6 +6,7 @@ import {
   pgTable,
   text,
   timestamp,
+  uniqueIndex,
   uuid,
 } from "drizzle-orm/pg-core";
 import {
@@ -47,6 +48,7 @@ export const memoryItems = pgTable(
     index("memory_items_user_idx").on(t.userId, t.kind),
     index("memory_items_household_idx").on(t.householdId, t.kind),
     index("memory_items_key_idx").on(t.key),
+    uniqueIndex("memory_items_user_key_unique").on(t.userId, t.key),
   ],
 );
 
@@ -59,13 +61,17 @@ export const tasteSignals = pgTable(
       .notNull()
       .references(() => users.id, { onDelete: "cascade" }),
     axis: tasteAxisEnum("axis").notNull(),
+    target: text("target"),
     direction: doublePrecision("direction").notNull(),
     strength: doublePrecision("strength").notNull().default(0.5),
     origin: signalOriginEnum("origin").notNull(),
     refRecipeId: uuid("ref_recipe_id").references(() => recipes.id, { onDelete: "set null" }),
     createdAt: createdAt(),
   },
-  (t) => [index("taste_signals_user_idx").on(t.userId, t.axis)],
+  (t) => [
+    index("taste_signals_user_idx").on(t.userId, t.axis),
+    uniqueIndex("taste_signals_user_axis_target_unique").on(t.userId, t.axis, t.target),
+  ],
 );
 
 /** Food Memory (spec §39): långsiktiga matminnen kopplade till högtider och betyg. */