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/analytics/exceptions.py

@@ -11,7 +11,7 @@ from app.exceptions.base import (
 )
 
 
-class ReportGenerationException(BusinessLogicException):  # noqa: MOD-025
+class ReportGenerationException(BusinessLogicException):  # noqa: MOD025
     """Raised when report generation fails."""
 
     def __init__(self, report_type: str, reason: str):
@@ -21,7 +21,7 @@ class ReportGenerationException(BusinessLogicException):  # noqa: MOD-025
         )
 
 
-class InvalidDateRangeException(ValidationException):  # noqa: MOD-025
+class InvalidDateRangeException(ValidationException):  # noqa: MOD025
     """Raised when an invalid date range is provided."""
 
     def __init__(self, start_date: str, end_date: str):