✨ Add space member model (#1780)

packages/database/prisma/migrations/20250616140319_create_space_members/migration.sql

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+-- CreateEnum
+CREATE TYPE "SpaceMemberRole" AS ENUM ('OWNER', 'ADMIN', 'MEMBER');
+
+-- CreateTable
+CREATE TABLE "space_members" (
+    "id" TEXT NOT NULL,
+    "space_id" TEXT NOT NULL,
+    "user_id" TEXT NOT NULL,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMP(3) NOT NULL,
+    "role" "SpaceMemberRole" NOT NULL DEFAULT 'MEMBER',
+
+    CONSTRAINT "space_members_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "space_members_space_id_idx" ON "space_members"("space_id");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "space_members_space_id_user_id_key" ON "space_members"("space_id", "user_id");
+
+-- AddForeignKey
+ALTER TABLE "space_members" ADD CONSTRAINT "space_members_space_id_fkey" FOREIGN KEY ("space_id") REFERENCES "spaces"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "space_members" ADD CONSTRAINT "space_members_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users"("id") ON DELETE CASCADE ON UPDATE CASCADE;

packages/database/prisma/migrations/20250616140359_space_members_migration/migration.sql

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+-- Create space members with OWNER role for existing spaces
+INSERT INTO "space_members" ("id", "space_id", "user_id", "created_at", "updated_at", "role")
+SELECT 
+  gen_random_uuid(),
+  id as space_id, 
+  owner_id as user_id, 
+  NOW() as created_at, 
+  NOW() as updated_at, 
+  'OWNER' as role
+FROM "spaces"
+WHERE NOT EXISTS (
+  SELECT 1 FROM "space_members" 
+  WHERE "space_members"."space_id" = "spaces"."id" 
+  AND "space_members"."user_id" = "spaces"."owner_id"
+);