diff --git a/LOGICAL_RELATIONSHIPS.md b/LOGICAL_RELATIONSHIPS.md
index bafc746..a75a39c 100644
--- a/LOGICAL_RELATIONSHIPS.md
+++ b/LOGICAL_RELATIONSHIPS.md
@@ -1,6 +1,6 @@
 # 논리적 데이터베이스 관계 문서
 
-> **자동 생성**: 2026-01-29 08:59:43
+> **자동 생성**: 2026-01-29 09:14:06
 > **소스**: Eloquent 모델 관계 분석
 
 ## 📊 모델별 관계 현황
diff --git a/database/migrations/2026_01_29_093000_add_gcs_uri_to_sales_consultations.php b/database/migrations/2026_01_29_093000_add_gcs_uri_to_sales_consultations.php
new file mode 100644
index 0000000..8ce6499
--- /dev/null
+++ b/database/migrations/2026_01_29_093000_add_gcs_uri_to_sales_consultations.php
@@ -0,0 +1,29 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('sales_consultations', function (Blueprint $table) {
+            $table->string('gcs_uri', 500)->nullable()->after('duration')
+                ->comment('Google Cloud Storage URI (본사 연구용 백업)');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('sales_consultations', function (Blueprint $table) {
+            $table->dropColumn('gcs_uri');
+        });
+    }
+};