style: apply black and isort formatting across entire codebase

- Standardize quote style (single to double quotes)
- Reorder and group imports alphabetically
- Fix line breaks and indentation for consistency
- Apply PEP 8 formatting standards

Also updated Makefile to exclude both venv and .venv from code quality checks.

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

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

app/exceptions/marketplace_import_job.py

@@ -4,24 +4,21 @@ Marketplace import specific exceptions.
 """
 
 from typing import Any, Dict, Optional
-from .base import (
-    ResourceNotFoundException,
-    ValidationException,
-    BusinessLogicException,
-    AuthorizationException,
-    ExternalServiceException
-)
+
+from .base import (AuthorizationException, BusinessLogicException,
+                   ExternalServiceException, ResourceNotFoundException,
+                   ValidationException)
 
 
 class MarketplaceImportException(BusinessLogicException):
     """Base exception for marketplace import operations."""
 
     def __init__(
-            self,
-            message: str,
-            error_code: str = "MARKETPLACE_IMPORT_ERROR",
-            marketplace: Optional[str] = None,
-            details: Optional[Dict[str, Any]] = None,
+        self,
+        message: str,
+        error_code: str = "MARKETPLACE_IMPORT_ERROR",
+        marketplace: Optional[str] = None,
+        details: Optional[Dict[str, Any]] = None,
     ):
         if not details:
             details = {}
@@ -67,11 +64,11 @@ class InvalidImportDataException(ValidationException):
     """Raised when import data is invalid."""
 
     def __init__(
-            self,
-            message: str = "Invalid import data",
-            field: Optional[str] = None,
-            row_number: Optional[int] = None,
-            details: Optional[Dict[str, Any]] = None,
+        self,
+        message: str = "Invalid import data",
+        field: Optional[str] = None,
+        row_number: Optional[int] = None,
+        details: Optional[Dict[str, Any]] = None,
     ):
         if not details:
             details = {}
@@ -118,7 +115,9 @@ class ImportJobCannotBeDeletedException(BusinessLogicException):
 class MarketplaceConnectionException(ExternalServiceException):
     """Raised when marketplace connection fails."""
 
-    def __init__(self, marketplace: str, message: str = "Failed to connect to marketplace"):
+    def __init__(
+        self, marketplace: str, message: str = "Failed to connect to marketplace"
+    ):
         super().__init__(
             service=marketplace,
             message=f"{message}: {marketplace}",
@@ -130,10 +129,10 @@ class MarketplaceDataParsingException(ValidationException):
     """Raised when marketplace data cannot be parsed."""
 
     def __init__(
-            self,
-            marketplace: str,
-            message: str = "Failed to parse marketplace data",
-            details: Optional[Dict[str, Any]] = None,
+        self,
+        marketplace: str,
+        message: str = "Failed to parse marketplace data",
+        details: Optional[Dict[str, Any]] = None,
     ):
         if not details:
             details = {}
@@ -150,10 +149,10 @@ class ImportRateLimitException(BusinessLogicException):
     """Raised when import rate limit is exceeded."""
 
     def __init__(
-            self,
-            max_imports: int,
-            time_window: str,
-            retry_after: Optional[int] = None,
+        self,
+        max_imports: int,
+        time_window: str,
+        retry_after: Optional[int] = None,
     ):
         details = {
             "max_imports": max_imports,