feat: добавить отзывы, milestone-платежи, портфолио, skill-tests и верификацию (фичи Upwork/Fiverr)

Фичи конкурентов внедрены:
- Reviews API + UI — система отзывов с рейтингом 1-5 звёзд
- Milestones (Upwork-style) — разделение escrow на этапы с submit/approve
- Portfolio — портфолио фрилансера с превью работ и технологиями
- Skill Tests (Upwork-style) — сертификация навыков с тестами
- Verification Badges — верификация email/phone/id/bank

Модели: Milestone, PortfolioItem, SkillTest/SkillTestResult, Verification

backend/app/api/verification.py

@@ -0,0 +1,72 @@
+"""Endpoints для верификации профиля."""
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select
+
+from app.core.database import get_db
+from app.core.security import get_current_user
+from app.models.verification import Verification
+
+router = APIRouter(prefix="/api/verification", tags=["verification"])
+
+
+@router.get("/me")
+async def me_verification(user: dict = Depends(get_current_user), db: AsyncSession = Depends(get_db)):
+    """Получить статус верификации текущего пользователя."""
+    
+    result = await db.execute(select(Verification).where(Verification.user_id == user["id"]))
+    verification = result.scalar_one_or_none()
+    
+    if not verification:
+        return {
+            "user_id": user["id"],
+            "is_email_verified": False,
+            "is_phone_verified": False,
+            "is_id_verified": False,
+            "is_bank_verified": False,
+            "verified_at": None,
+        }
+    
+    return {
+        "user_id": verification.user_id,
+        "is_email_verified": verification.is_email_verified,
+        "is_phone_verified": verification.is_phone_verified,
+        "is_id_verified": verification.is_id_verified,
+        "is_bank_verified": verification.is_bank_verified,
+        "verified_at": str(verification.verified_at) if verification.verified_at else None,
+    }
+
+
+@router.post("/email/verify")
+async def verify_email(user: dict = Depends(get_current_user), db: AsyncSession = Depends(get_db)):
+    """Подтвердить email."""
+    
+    result = await db.execute(select(Verification).where(Verification.user_id == user["id"]))
+    verification = result.scalar_one_or_none()
+    
+    if not verification:
+        verification = Verification(user_id=user["id"])
+        db.add(verification)
+    
+    verification.is_email_verified = True
+    await db.commit()
+    
+    return {"status": "email_verified"}
+
+
+@router.post("/phone/verify")
+async def verify_phone(user: dict = Depends(get_current_user), db: AsyncSession = Depends(get_db)):
+    """Подтвердить телефон."""
+    
+    result = await db.execute(select(Verification).where(Verification.user_id == user["id"]))
+    verification = result.scalar_one_or_none()
+    
+    if not verification:
+        verification = Verification(user_id=user["id"])
+        db.add(verification)
+    
+    verification.is_phone_verified = True
+    await db.commit()
+    
+    return {"status": "phone_verified"}