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>

scripts/validate/validate_architecture.py

@@ -1747,7 +1747,7 @@ class ArchitectureValidator:
                     line_number=i,
                     message="Raw number input found - use number_stepper macro for consistent styling",
                     context=stripped[:70],
-                    suggestion="{% from 'shared/macros/inputs.html' import number_stepper %}\n{{ number_stepper(model='fieldName', min=1, max=100) }}\nOr add {# noqa: FE-008 #} if this is intentional (e.g., ID field)",
+                    suggestion="{% from 'shared/macros/inputs.html' import number_stepper %}\n{{ number_stepper(model='fieldName', min=1, max=100) }}\nOr add {# noqa: FE008 #} if this is intentional (e.g., ID field)",
                 )
                 return  # Only report once per file
 
@@ -2618,7 +2618,7 @@ class ArchitectureValidator:
                 continue
             for i, line in enumerate(lines, 1):
                 if re.match(r"\s*except\s+Exception\s*(as\s+\w+)?\s*:", line):
-                    if "noqa: EXC-003" in line or "noqa: exc-003" in line:
+                    if "noqa: EXC003" in line or "noqa: EXC-003" in line:
                         continue
                     self._add_violation(
                         rule_id="EXC-003",
@@ -2628,7 +2628,7 @@ class ArchitectureValidator:
                         line_number=i,
                         message="Broad 'except Exception' catches too many error types",
                         context=line.strip(),
-                        suggestion="Catch specific exceptions instead, or add '# noqa: EXC-003' to suppress",
+                        suggestion="Catch specific exceptions instead, or add '# noqa: EXC003' to suppress",
                     )
 
         # EXC-004: Check exception inheritance in exceptions module
@@ -4901,7 +4901,7 @@ class ArchitectureValidator:
                 match = exception_class_pattern.match(line)
                 if match:
                     # Check for noqa suppression
-                    if "noqa: MOD-025" in line or "noqa: mod-025" in line:
+                    if "noqa: MOD025" in line or "noqa: MOD-025" in line:
                         continue
                     exception_classes.append((match.group(1), exc_file, i))