feat(portfolio): 백엔드 서비스 + 인프라 설정

- FastAPI 앱: DB(5테이블), Pydantic 모델, 토큰 인증, 전체 API 라우트
- Docker Compose: portfolio 서비스 (포트 18850)
- Nginx: /api/profile/ → portfolio:8000
- 배포 스크립트: portfolio 추가

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

portfolio/app/models.py

@@ -0,0 +1,90 @@
+from typing import Optional, List
+from pydantic import BaseModel
+
+
+class ProfileUpdate(BaseModel):
+    name: Optional[str] = None
+    name_en: Optional[str] = None
+    role: Optional[str] = None
+    role_en: Optional[str] = None
+    email: Optional[str] = None
+    phone: Optional[str] = None
+    github_url: Optional[str] = None
+    blog_url: Optional[str] = None
+    photo_url: Optional[str] = None
+    bio: Optional[str] = None
+
+
+class CareerCreate(BaseModel):
+    category: str = "company"
+    organization: str = ""
+    role: str = ""
+    description: str = ""
+    start_date: str = ""
+    end_date: str = ""
+    sort_order: int = 0
+
+
+class CareerUpdate(BaseModel):
+    category: Optional[str] = None
+    organization: Optional[str] = None
+    role: Optional[str] = None
+    description: Optional[str] = None
+    start_date: Optional[str] = None
+    end_date: Optional[str] = None
+    sort_order: Optional[int] = None
+
+
+class ProjectCreate(BaseModel):
+    category: str = "personal"
+    title: str = ""
+    description: str = ""
+    tech_stack: List[str] = []
+    role: str = ""
+    start_date: str = ""
+    end_date: str = ""
+    url: str = ""
+    image_url: str = ""
+    sort_order: int = 0
+
+
+class ProjectUpdate(BaseModel):
+    category: Optional[str] = None
+    title: Optional[str] = None
+    description: Optional[str] = None
+    tech_stack: Optional[List[str]] = None
+    role: Optional[str] = None
+    start_date: Optional[str] = None
+    end_date: Optional[str] = None
+    url: Optional[str] = None
+    image_url: Optional[str] = None
+    sort_order: Optional[int] = None
+
+
+class SkillCreate(BaseModel):
+    category: str = "language"
+    name: str = ""
+    level: int = 3
+    sort_order: int = 0
+
+
+class SkillUpdate(BaseModel):
+    category: Optional[str] = None
+    name: Optional[str] = None
+    level: Optional[int] = None
+    sort_order: Optional[int] = None
+
+
+class IntroCreate(BaseModel):
+    title: str = ""
+    content: str = ""
+    is_main: int = 0
+
+
+class IntroUpdate(BaseModel):
+    title: Optional[str] = None
+    content: Optional[str] = None
+
+
+class AuthRequest(BaseModel):
+    password: str