refactor: move vendor product schemas to models/schema and add API-002 rule

- Add API-002 architecture rule preventing Pydantic imports in API endpoints
- Move inline Pydantic models from vendor_products.py to models/schema/vendor_product.py
- Update vendor_products.py to import schemas from proper location

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app/api/v1/admin/vendor_products.py

@@ -6,162 +6,35 @@ Provides management of vendor-specific product catalogs:
 - Browse products in vendor catalogs
 - View product details with override info
 - Remove products from catalog
+
+Architecture Notes:
+- All Pydantic schemas are defined in models/schema/vendor_product.py
+- Business logic is delegated to vendor_product_service
 """
 
 import logging
 
 from fastapi import APIRouter, Depends, Query
-from pydantic import BaseModel
 from sqlalchemy.orm import Session
 
 from app.api.deps import get_current_admin_api
 from app.core.database import get_db
 from app.services.vendor_product_service import vendor_product_service
 from models.database.user import User
+from models.schema.vendor_product import (
+    CatalogVendor,
+    CatalogVendorsResponse,
+    RemoveProductResponse,
+    VendorProductDetail,
+    VendorProductListItem,
+    VendorProductListResponse,
+    VendorProductStats,
+)
 
 router = APIRouter(prefix="/vendor-products")
 logger = logging.getLogger(__name__)
 
 
-# ============================================================================
-# Pydantic Models
-# ============================================================================
-
-
-class VendorProductListItem(BaseModel):
-    """Product item for vendor catalog list view."""
-
-    id: int
-    vendor_id: int
-    vendor_name: str | None = None
-    vendor_code: str | None = None
-    marketplace_product_id: int
-    vendor_sku: str | None = None
-    title: str | None = None
-    brand: str | None = None
-    effective_price: float | None = None
-    effective_currency: str | None = None
-    is_active: bool | None = None
-    is_featured: bool | None = None
-    is_digital: bool | None = None
-    image_url: str | None = None
-    source_marketplace: str | None = None
-    source_vendor: str | None = None
-    created_at: str | None = None
-    updated_at: str | None = None
-
-    class Config:
-        from_attributes = True
-
-
-class VendorProductListResponse(BaseModel):
-    """Paginated vendor product list response."""
-
-    products: list[VendorProductListItem]
-    total: int
-    skip: int
-    limit: int
-
-
-class VendorProductStats(BaseModel):
-    """Vendor product statistics."""
-
-    total: int
-    active: int
-    inactive: int
-    featured: int
-    digital: int
-    physical: int
-    by_vendor: dict[str, int]
-
-
-class CatalogVendor(BaseModel):
-    """Vendor with products in catalog."""
-
-    id: int
-    name: str
-    vendor_code: str
-
-
-class CatalogVendorsResponse(BaseModel):
-    """Response for catalog vendors list."""
-
-    vendors: list[CatalogVendor]
-
-
-class VendorProductDetail(BaseModel):
-    """Detailed vendor product information."""
-
-    id: int
-    vendor_id: int
-    vendor_name: str | None = None
-    vendor_code: str | None = None
-    marketplace_product_id: int
-    vendor_sku: str | None = None
-    # Override info from get_override_info()
-    price: float | None = None
-    price_overridden: bool | None = None
-    price_source: float | None = None
-    sale_price: float | None = None
-    sale_price_overridden: bool | None = None
-    sale_price_source: float | None = None
-    currency: str | None = None
-    currency_overridden: bool | None = None
-    currency_source: str | None = None
-    brand: str | None = None
-    brand_overridden: bool | None = None
-    brand_source: str | None = None
-    condition: str | None = None
-    condition_overridden: bool | None = None
-    condition_source: str | None = None
-    availability: str | None = None
-    availability_overridden: bool | None = None
-    availability_source: str | None = None
-    primary_image_url: str | None = None
-    primary_image_url_overridden: bool | None = None
-    primary_image_url_source: str | None = None
-    is_digital: bool | None = None
-    product_type: str | None = None
-    # Vendor-specific fields
-    is_featured: bool | None = None
-    is_active: bool | None = None
-    display_order: int | None = None
-    min_quantity: int | None = None
-    max_quantity: int | None = None
-    # Supplier tracking
-    supplier: str | None = None
-    supplier_product_id: str | None = None
-    cost: float | None = None  # What vendor pays to acquire product
-    margin_percent: float | None = None
-    # Tax/profit info
-    tax_rate_percent: int | None = None
-    net_price: float | None = None
-    vat_amount: float | None = None
-    profit: float | None = None
-    profit_margin_percent: float | None = None
-    # Digital fulfillment
-    download_url: str | None = None
-    license_type: str | None = None
-    fulfillment_email_template: str | None = None
-    # Source info
-    source_marketplace: str | None = None
-    source_vendor: str | None = None
-    source_gtin: str | None = None
-    source_sku: str | None = None
-    # Translations
-    marketplace_translations: dict | None = None
-    vendor_translations: dict | None = None
-    # Timestamps
-    created_at: str | None = None
-    updated_at: str | None = None
-
-
-class RemoveProductResponse(BaseModel):
-    """Response from product removal."""
-
-    message: str
-
-
 # ============================================================================
 # Endpoints
 # ============================================================================