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/base.py

@@ -8,7 +8,7 @@ This module provides classes and functions for:
 - Standardized error response structure
 """
 
-from typing import Any, Dict, Optional
+from typing import Any
 
 
 class WizamartException(Exception):
@@ -19,7 +19,7 @@ class WizamartException(Exception):
         message: str,
         error_code: str,
         status_code: int = 400,
-        details: Optional[Dict[str, Any]] = None,
+        details: dict[str, Any] | None = None,
     ):
         self.message = message
         self.error_code = error_code
@@ -27,7 +27,7 @@ class WizamartException(Exception):
         self.details = details or {}
         super().__init__(self.message)
 
-    def to_dict(self) -> Dict[str, Any]:
+    def to_dict(self) -> dict[str, Any]:
         """Convert exception to dictionary for JSON response."""
         result = {
             "error_code": self.error_code,
@@ -45,8 +45,8 @@ class ValidationException(WizamartException):
     def __init__(
         self,
         message: str,
-        field: Optional[str] = None,
-        details: Optional[Dict[str, Any]] = None,
+        field: str | None = None,
+        details: dict[str, Any] | None = None,
     ):
         validation_details = details or {}
         if field:
@@ -67,7 +67,7 @@ class AuthenticationException(WizamartException):
         self,
         message: str = "Authentication failed",
         error_code: str = "AUTHENTICATION_FAILED",
-        details: Optional[Dict[str, Any]] = None,
+        details: dict[str, Any] | None = None,
     ):
         super().__init__(
             message=message,
@@ -84,7 +84,7 @@ class AuthorizationException(WizamartException):
         self,
         message: str = "Access denied",
         error_code: str = "AUTHORIZATION_FAILED",
-        details: Optional[Dict[str, Any]] = None,
+        details: dict[str, Any] | None = None,
     ):
         super().__init__(
             message=message,
@@ -101,8 +101,8 @@ class ResourceNotFoundException(WizamartException):
         self,
         resource_type: str,
         identifier: str,
-        message: Optional[str] = None,
-        error_code: Optional[str] = None,
+        message: str | None = None,
+        error_code: str | None = None,
     ):
         if not message:
             message = f"{resource_type} with identifier '{identifier}' not found"
@@ -127,7 +127,7 @@ class ConflictException(WizamartException):
         self,
         message: str,
         error_code: str = "RESOURCE_CONFLICT",
-        details: Optional[Dict[str, Any]] = None,
+        details: dict[str, Any] | None = None,
     ):
         super().__init__(
             message=message,
@@ -144,7 +144,7 @@ class BusinessLogicException(WizamartException):
         self,
         message: str,
         error_code: str,
-        details: Optional[Dict[str, Any]] = None,
+        details: dict[str, Any] | None = None,
     ):
         super().__init__(
             message=message,
@@ -162,7 +162,7 @@ class ExternalServiceException(WizamartException):
         message: str,
         service_name: str,
         error_code: str = "EXTERNAL_SERVICE_ERROR",
-        details: Optional[Dict[str, Any]] = None,
+        details: dict[str, Any] | None = None,
     ):
         service_details = details or {}
         service_details["service_name"] = service_name
@@ -181,8 +181,8 @@ class RateLimitException(WizamartException):
     def __init__(
         self,
         message: str = "Rate limit exceeded",
-        retry_after: Optional[int] = None,
-        details: Optional[Dict[str, Any]] = None,
+        retry_after: int | None = None,
+        details: dict[str, Any] | None = None,
     ):
         rate_limit_details = details or {}
         if retry_after: