feat(models): households ve householdMembers Mongoose modelleri

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/models/household-member.ts

@@ -0,0 +1,26 @@
+import { model, models, Schema, type InferSchemaType, type Model } from "mongoose";
+import { HOUSEHOLD_ROLES } from "@/features/households/types";
+
+/** Kullanıcının bir hanedeki üyeliği ve hane içi rolü (owner | member | viewer). */
+const householdMemberSchema = new Schema(
+  {
+    householdId: { type: Schema.Types.ObjectId, ref: "Household", required: true },
+    /** Better Auth `user` koleksiyonundaki _id. */
+    userId: { type: Schema.Types.ObjectId, required: true },
+    role: { type: String, enum: HOUSEHOLD_ROLES, required: true },
+    createdBy: { type: Schema.Types.ObjectId, required: true },
+    updatedBy: { type: Schema.Types.ObjectId, required: true },
+  },
+  { timestamps: true, collection: "householdMembers" },
+);
+
+// Bir kullanıcı bir hanede yalnızca bir kez üye olabilir.
+householdMemberSchema.index({ householdId: 1, userId: 1 }, { unique: true });
+// Kullanıcının hanelerini hızlı listelemek için.
+householdMemberSchema.index({ userId: 1, householdId: 1 });
+
+export type HouseholdMember = InferSchemaType<typeof householdMemberSchema>;
+
+export const HouseholdMemberModel: Model<HouseholdMember> =
+  (models.HouseholdMember as Model<HouseholdMember> | undefined) ??
+  model<HouseholdMember>("HouseholdMember", householdMemberSchema);