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/monitoring/exceptions.py

@@ -38,7 +38,7 @@ __all__ = [
 # =============================================================================
 
 
-class TaskNotFoundException(ResourceNotFoundException):  # noqa: MOD-025
+class TaskNotFoundException(ResourceNotFoundException):  # noqa: MOD025
     """Raised when a background task is not found."""
 
     def __init__(self, task_id: str):
@@ -54,7 +54,7 @@ class TaskNotFoundException(ResourceNotFoundException):  # noqa: MOD-025
 # =============================================================================
 
 
-class CapacitySnapshotNotFoundException(ResourceNotFoundException):  # noqa: MOD-025
+class CapacitySnapshotNotFoundException(ResourceNotFoundException):  # noqa: MOD025
     """Raised when a capacity snapshot is not found."""
 
     def __init__(self, snapshot_id: int):
@@ -70,7 +70,7 @@ class CapacitySnapshotNotFoundException(ResourceNotFoundException):  # noqa: MOD
 # =============================================================================
 
 
-class MonitoringServiceException(BusinessLogicException):  # noqa: MOD-025
+class MonitoringServiceException(BusinessLogicException):  # noqa: MOD025
     """Raised when a monitoring operation fails."""
 
     def __init__(self, operation: str, reason: str):
@@ -108,7 +108,7 @@ class ScanNotFoundException(ResourceNotFoundException):
         )
 
 
-class ScanExecutionException(ExternalServiceException):  # noqa: MOD-025
+class ScanExecutionException(ExternalServiceException):  # noqa: MOD025
     """Raised when architecture scan execution fails."""
 
     def __init__(self, reason: str):
@@ -142,7 +142,7 @@ class ScanParseException(BusinessLogicException):
         )
 
 
-class ViolationOperationException(BusinessLogicException):  # noqa: MOD-025
+class ViolationOperationException(BusinessLogicException):  # noqa: MOD025
     """Raised when a violation operation fails."""
 
     def __init__(self, operation: str, violation_id: int, reason: str):
@@ -157,7 +157,7 @@ class ViolationOperationException(BusinessLogicException):  # noqa: MOD-025
         )
 
 
-class InvalidViolationStatusException(ValidationException):  # noqa: MOD-025
+class InvalidViolationStatusException(ValidationException):  # noqa: MOD025
     """Raised when a violation status transition is invalid."""
 
     def __init__(self, violation_id: int, current_status: str, target_status: str):