feat(validators): add noqa suppression support to security and performance validators

- Add centralized _is_noqa_suppressed() to BaseValidator with normalization
  (accepts both SEC001 and SEC-001 formats for ruff compatibility)
- Wire noqa support into all 21 security and 18 performance check functions
- Add ruff external config for SEC/PERF/MOD/EXC codes in pyproject.toml
- Convert all 280 Python noqa comments to dashless format (ruff-compatible)
- Add site/ to IGNORE_PATTERNS (excludes mkdocs build output)
- Suppress 152 false positive findings (test passwords, seed data, validator
  self-references, Apple Wallet SHA1, etc.)
- Security: 79 errors → 0, 60 warnings → 0
- Performance: 80 warnings → 77 (3 test script suppressions)
- Add proposal doc with noqa inventory and remaining findings recommendations

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/catalog/exceptions.py

@@ -63,7 +63,7 @@ class ProductAlreadyExistsException(ConflictException):
         )
 
 
-class ProductNotInCatalogException(ResourceNotFoundException):  # noqa: MOD-025
+class ProductNotInCatalogException(ResourceNotFoundException):  # noqa: MOD025
     """Raised when trying to access a product that's not in store's catalog."""
 
     def __init__(self, product_id: int, store_id: int):
@@ -129,7 +129,7 @@ class ProductValidationException(ValidationException):
         self.error_code = "PRODUCT_VALIDATION_FAILED"
 
 
-class CannotDeleteProductException(BusinessLogicException):  # noqa: MOD-025
+class CannotDeleteProductException(BusinessLogicException):  # noqa: MOD025
     """Raised when a product cannot be deleted due to dependencies."""
 
     def __init__(self, product_id: int, reason: str, details: dict | None = None):
@@ -140,7 +140,7 @@ class CannotDeleteProductException(BusinessLogicException):  # noqa: MOD-025
         )
 
 
-class CannotDeleteProductWithInventoryException(BusinessLogicException):  # noqa: MOD-025
+class CannotDeleteProductWithInventoryException(BusinessLogicException):  # noqa: MOD025
     """Raised when trying to delete a product that has inventory."""
 
     def __init__(self, product_id: int, inventory_count: int):
@@ -154,7 +154,7 @@ class CannotDeleteProductWithInventoryException(BusinessLogicException):  # noqa
         )
 
 
-class CannotDeleteProductWithOrdersException(BusinessLogicException):  # noqa: MOD-025
+class CannotDeleteProductWithOrdersException(BusinessLogicException):  # noqa: MOD025
     """Raised when trying to delete a product that has been ordered."""
 
     def __init__(self, product_id: int, order_count: int):