refactor: migrate schemas to canonical module locations

Migrate remaining legacy schemas to their respective modules:

Marketplace module (app/modules/marketplace/schemas/):
- letzshop.py: Letzshop credentials, orders, fulfillment, sync
- onboarding.py: Vendor onboarding wizard schemas

Catalog module (app/modules/catalog/schemas/):
- product.py: ProductCreate, ProductUpdate, ProductResponse

Payments module (app/modules/payments/schemas/):
- payment.py: PaymentConfig, Stripe, transactions, balance

Delete legacy files:
- models/schema/letzshop.py
- models/schema/onboarding.py
- models/schema/product.py
- models/schema/payment.py
- models/schema/marketplace_product.py (re-export)
- models/schema/marketplace_import_job.py (re-export)
- models/schema/search.py (empty)

Update imports across 19 files to use canonical locations.

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

app/modules/catalog/schemas/__init__.py

@@ -2,13 +2,31 @@
 """Catalog module schemas."""
 
 from app.modules.catalog.schemas.catalog import (
+    ProductDetailResponse as CatalogProductDetailResponse,
+    ProductListResponse as CatalogProductListResponse,
+    ProductResponse as CatalogProductResponse,
+)
+from app.modules.catalog.schemas.product import (
+    ProductCreate,
+    ProductUpdate,
+    ProductResponse,
     ProductDetailResponse,
     ProductListResponse,
-    ProductResponse,
+    ProductDeleteResponse,
+    ProductToggleResponse,
 )
 
 __all__ = [
+    # Catalog browsing schemas (storefront)
+    "CatalogProductResponse",
+    "CatalogProductDetailResponse",
+    "CatalogProductListResponse",
+    # Product CRUD schemas (vendor management)
+    "ProductCreate",
+    "ProductUpdate",
     "ProductResponse",
     "ProductDetailResponse",
     "ProductListResponse",
+    "ProductDeleteResponse",
+    "ProductToggleResponse",
 ]

app/modules/catalog/schemas/catalog.py

@@ -11,7 +11,7 @@ from datetime import datetime
 from pydantic import BaseModel, ConfigDict, Field
 
 from app.modules.inventory.schemas import InventoryLocationResponse
-from models.schema.marketplace_product import MarketplaceProductResponse
+from app.modules.marketplace.schemas import MarketplaceProductResponse
 
 
 class ProductResponse(BaseModel):

app/modules/catalog/schemas/product.py

@@ -0,0 +1,94 @@
+# app/modules/catalog/schemas/product.py
+"""
+Pydantic schemas for Product CRUD operations.
+
+These schemas are used for vendor product catalog management,
+linking vendor products to marketplace products.
+"""
+
+from datetime import datetime
+
+from pydantic import BaseModel, ConfigDict, Field
+
+from app.modules.inventory.schemas import InventoryLocationResponse
+from app.modules.marketplace.schemas import MarketplaceProductResponse
+
+
+class ProductCreate(BaseModel):
+    marketplace_product_id: int = Field(
+        ..., description="MarketplaceProduct ID to add to vendor catalog"
+    )
+    vendor_sku: str | None = Field(None, description="Vendor's internal SKU")
+    price: float | None = Field(None, ge=0)
+    sale_price: float | None = Field(None, ge=0)
+    currency: str | None = None
+    availability: str | None = None
+    condition: str | None = None
+    is_featured: bool = False
+    min_quantity: int = Field(1, ge=1)
+    max_quantity: int | None = Field(None, ge=1)
+
+
+class ProductUpdate(BaseModel):
+    vendor_sku: str | None = None
+    price: float | None = Field(None, ge=0)
+    sale_price: float | None = Field(None, ge=0)
+    currency: str | None = None
+    availability: str | None = None
+    condition: str | None = None
+    is_featured: bool | None = None
+    is_active: bool | None = None
+    min_quantity: int | None = Field(None, ge=1)
+    max_quantity: int | None = Field(None, ge=1)
+
+
+class ProductResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    id: int
+    vendor_id: int
+    marketplace_product: MarketplaceProductResponse
+    vendor_sku: str | None
+    price: float | None
+    sale_price: float | None
+    currency: str | None
+    availability: str | None
+    condition: str | None
+    is_featured: bool
+    is_active: bool
+    display_order: int
+    min_quantity: int
+    max_quantity: int | None
+    created_at: datetime
+    updated_at: datetime
+
+    # Include inventory summary
+    total_inventory: int | None = None
+    available_inventory: int | None = None
+
+
+class ProductDetailResponse(ProductResponse):
+    """Product with full inventory details."""
+
+    inventory_locations: list[InventoryLocationResponse] = []
+
+
+class ProductListResponse(BaseModel):
+    products: list[ProductResponse]
+    total: int
+    skip: int
+    limit: int
+
+
+class ProductDeleteResponse(BaseModel):
+    """Response for product deletion."""
+
+    message: str
+
+
+class ProductToggleResponse(BaseModel):
+    """Response for product toggle operations (active/featured)."""
+
+    message: str
+    is_active: bool | None = None
+    is_featured: bool | None = None