refactor: modernize code quality tooling with Ruff

- Replace black, isort, and flake8 with Ruff (all-in-one linter and formatter)
- Add comprehensive pyproject.toml configuration
- Simplify Makefile code quality targets
- Configure exclusions for venv/.venv in pyproject.toml
- Auto-fix 1,359 linting issues across codebase

Benefits:
- Much faster builds (Ruff is written in Rust)
- Single tool replaces multiple tools
- More comprehensive rule set (UP, B, C4, SIM, PIE, RET, Q)
- All configuration centralized in pyproject.toml
- Better import sorting and formatting consistency

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

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

app/exceptions/marketplace_import_job.py

@@ -3,11 +3,15 @@
 Marketplace import specific exceptions.
 """
 
-from typing import Any, Dict, Optional
+from typing import Any
 
-from .base import (AuthorizationException, BusinessLogicException,
-                   ExternalServiceException, ResourceNotFoundException,
-                   ValidationException)
+from .base import (
+    AuthorizationException,
+    BusinessLogicException,
+    ExternalServiceException,
+    ResourceNotFoundException,
+    ValidationException,
+)
 
 
 class MarketplaceImportException(BusinessLogicException):
@@ -17,8 +21,8 @@ class MarketplaceImportException(BusinessLogicException):
         self,
         message: str,
         error_code: str = "MARKETPLACE_IMPORT_ERROR",
-        marketplace: Optional[str] = None,
-        details: Optional[Dict[str, Any]] = None,
+        marketplace: str | None = None,
+        details: dict[str, Any] | None = None,
     ):
         if not details:
             details = {}
@@ -48,7 +52,7 @@ class ImportJobNotFoundException(ResourceNotFoundException):
 class ImportJobNotOwnedException(AuthorizationException):
     """Raised when user tries to access import job they don't own."""
 
-    def __init__(self, job_id: int, user_id: Optional[int] = None):
+    def __init__(self, job_id: int, user_id: int | None = None):
         details = {"job_id": job_id}
         if user_id:
             details["user_id"] = user_id
@@ -66,9 +70,9 @@ class InvalidImportDataException(ValidationException):
     def __init__(
         self,
         message: str = "Invalid import data",
-        field: Optional[str] = None,
-        row_number: Optional[int] = None,
-        details: Optional[Dict[str, Any]] = None,
+        field: str | None = None,
+        row_number: int | None = None,
+        details: dict[str, Any] | None = None,
     ):
         if not details:
             details = {}
@@ -132,7 +136,7 @@ class MarketplaceDataParsingException(ValidationException):
         self,
         marketplace: str,
         message: str = "Failed to parse marketplace data",
-        details: Optional[Dict[str, Any]] = None,
+        details: dict[str, Any] | None = None,
     ):
         if not details:
             details = {}
@@ -152,7 +156,7 @@ class ImportRateLimitException(BusinessLogicException):
         self,
         max_imports: int,
         time_window: str,
-        retry_after: Optional[int] = None,
+        retry_after: int | None = None,
     ):
         details = {
             "max_imports": max_imports,
@@ -172,7 +176,7 @@ class ImportRateLimitException(BusinessLogicException):
 class InvalidMarketplaceException(ValidationException):
     """Raised when marketplace is not supported."""
 
-    def __init__(self, marketplace: str, supported_marketplaces: Optional[list] = None):
+    def __init__(self, marketplace: str, supported_marketplaces: list | None = None):
         details = {"marketplace": marketplace}
         if supported_marketplaces:
             details["supported_marketplaces"] = supported_marketplaces