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/payments/schemas/__init__.py

@@ -3,10 +3,33 @@
 Payments module Pydantic schemas.
 """
 
-from pydantic import BaseModel, Field
 from datetime import datetime
 from typing import Any
 
+from pydantic import BaseModel, Field
+
+from app.modules.payments.schemas.payment import (
+    # Configuration
+    PaymentConfigResponse,
+    PaymentConfigUpdate,
+    PaymentConfigUpdateResponse,
+    # Stripe
+    StripeConnectRequest,
+    StripeConnectResponse,
+    StripeDisconnectResponse,
+    # Methods
+    PaymentMethodInfo,
+    PaymentMethodsResponse,
+    # Transactions
+    TransactionInfo,
+    TransactionsResponse,
+    # Balance
+    PaymentBalanceResponse,
+    # Refunds (config version)
+    PaymentRefundRequest,
+    PaymentRefundResponse,
+)
+
 
 class PaymentRequest(BaseModel):
     """Request to process a payment."""
@@ -83,6 +106,7 @@ class GatewayResponse(BaseModel):
 
 
 __all__ = [
+    # Core payment schemas
     "PaymentRequest",
     "PaymentResponse",
     "RefundRequest",
@@ -90,4 +114,23 @@ __all__ = [
     "PaymentMethodCreate",
     "PaymentMethodResponse",
     "GatewayResponse",
+    # Configuration schemas
+    "PaymentConfigResponse",
+    "PaymentConfigUpdate",
+    "PaymentConfigUpdateResponse",
+    # Stripe integration
+    "StripeConnectRequest",
+    "StripeConnectResponse",
+    "StripeDisconnectResponse",
+    # Payment methods info
+    "PaymentMethodInfo",
+    "PaymentMethodsResponse",
+    # Transactions
+    "TransactionInfo",
+    "TransactionsResponse",
+    # Balance
+    "PaymentBalanceResponse",
+    # Refunds (config version)
+    "PaymentRefundRequest",
+    "PaymentRefundResponse",
 ]

app/modules/payments/schemas/payment.py

@@ -0,0 +1,167 @@
+# app/modules/payments/schemas/payment.py
+"""
+Payment Pydantic schemas for API validation and responses.
+
+This module provides schemas for:
+- Payment configuration
+- Stripe integration
+- Payment methods
+- Transactions and balance
+- Refunds
+"""
+
+from datetime import datetime
+from typing import Any
+
+from pydantic import BaseModel, Field
+
+# ============================================================================
+# PAYMENT CONFIGURATION SCHEMAS
+# ============================================================================
+
+
+class PaymentConfigResponse(BaseModel):
+    """Response for payment configuration."""
+
+    payment_gateway: str | None = None
+    accepted_methods: list[str] = []
+    currency: str = "EUR"
+    stripe_connected: bool = False
+    stripe_account_id: str | None = None
+    paypal_connected: bool = False
+    message: str | None = None
+
+
+class PaymentConfigUpdate(BaseModel):
+    """Request model for updating payment configuration."""
+
+    payment_gateway: str | None = Field(None, max_length=50)
+    accepted_methods: list[str] | None = None
+    currency: str | None = Field(None, max_length=3)
+
+
+class PaymentConfigUpdateResponse(BaseModel):
+    """Response for payment configuration update."""
+
+    success: bool = False
+    message: str | None = None
+
+
+# ============================================================================
+# STRIPE INTEGRATION SCHEMAS
+# ============================================================================
+
+
+class StripeConnectRequest(BaseModel):
+    """Request model for connecting Stripe account."""
+
+    authorization_code: str | None = None
+    state: str | None = None
+
+
+class StripeConnectResponse(BaseModel):
+    """Response for Stripe connection."""
+
+    connected: bool = False
+    stripe_account_id: str | None = None
+    message: str | None = None
+
+
+class StripeDisconnectResponse(BaseModel):
+    """Response for Stripe disconnection."""
+
+    disconnected: bool = False
+    message: str | None = None
+
+
+# ============================================================================
+# PAYMENT METHODS SCHEMAS
+# ============================================================================
+
+
+class PaymentMethodInfo(BaseModel):
+    """Information about a payment method."""
+
+    id: str
+    name: str
+    type: str  # credit_card, paypal, bank_transfer, etc.
+    enabled: bool = True
+    icon: str | None = None
+
+
+class PaymentMethodsResponse(BaseModel):
+    """Response for payment methods listing."""
+
+    methods: list[PaymentMethodInfo] = []
+    message: str | None = None
+
+
+# ============================================================================
+# TRANSACTION SCHEMAS
+# ============================================================================
+
+
+class TransactionInfo(BaseModel):
+    """Information about a payment transaction."""
+
+    id: int
+    order_id: int | None = None
+    amount: float
+    currency: str = "EUR"
+    status: str  # pending, completed, failed, refunded
+    payment_method: str | None = None
+    customer_email: str | None = None
+    created_at: datetime
+    completed_at: datetime | None = None
+    metadata: dict[str, Any] | None = None
+
+
+class TransactionsResponse(BaseModel):
+    """Response for payment transactions listing."""
+
+    transactions: list[TransactionInfo] = []
+    total: int = 0
+    skip: int = 0
+    limit: int = 50
+    message: str | None = None
+
+
+# ============================================================================
+# BALANCE SCHEMAS
+# ============================================================================
+
+
+class PaymentBalanceResponse(BaseModel):
+    """Response for payment balance information."""
+
+    available_balance: float = 0.0
+    pending_balance: float = 0.0
+    currency: str = "EUR"
+    next_payout_date: datetime | None = None
+    last_payout_date: datetime | None = None
+    last_payout_amount: float | None = None
+    message: str | None = None
+
+
+# ============================================================================
+# REFUND SCHEMAS (for payment config endpoints)
+# ============================================================================
+
+
+class PaymentRefundRequest(BaseModel):
+    """Request model for processing a refund (payment module version)."""
+
+    amount: float | None = Field(
+        None, gt=0, description="Partial refund amount, or None for full refund"
+    )
+    reason: str | None = Field(None, max_length=500)
+
+
+class PaymentRefundResponse(BaseModel):
+    """Response for refund operation (payment module version)."""
+
+    refund_id: int | None = None
+    payment_id: int | None = None
+    amount: float | None = None
+    status: str | None = None  # pending, completed, failed
+    message: str | None = None