v0.0.21 | NHN Cloud 멀티 프로젝트 지원 추가

- NHNCloudProject 모델 추가 (사용자별 여러 프로젝트 관리)
- 프로젝트 목록/추가/삭제/활성화 API 추가
- 프로젝트별 비밀번호 복호화 API 추가

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

users/migrations/0010_nhncloudproject.py

@@ -0,0 +1,36 @@
+# Generated by Django 4.2.14 on 2026-01-14 11:59
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('users', '0009_add_nhn_cloud_credentials'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='NHNCloudProject',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=100, verbose_name='프로젝트 별칭')),
+                ('tenant_id', models.CharField(max_length=64, verbose_name='NHN Cloud Tenant ID')),
+                ('username', models.EmailField(max_length=254, verbose_name='NHN Cloud Username')),
+                ('encrypted_password', models.BinaryField(verbose_name='NHN Cloud API Password (암호화)')),
+                ('storage_account', models.CharField(blank=True, max_length=128, null=True, verbose_name='Storage Account')),
+                ('is_active', models.BooleanField(default=False, verbose_name='활성 프로젝트')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='nhn_projects', to=settings.AUTH_USER_MODEL, verbose_name='사용자')),
+            ],
+            options={
+                'verbose_name': 'NHN Cloud 프로젝트',
+                'verbose_name_plural': 'NHN Cloud 프로젝트',
+                'ordering': ['-is_active', '-created_at'],
+                'unique_together': {('user', 'tenant_id')},
+            },
+        ),
+    ]