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_security.py

@@ -357,9 +357,9 @@ class SecurityValidator(BaseValidator):
     def _check_command_injection(self, file_path: Path, content: str, lines: list[str]):
         """SEC-012: Check for command injection vulnerabilities"""
         patterns = [
-            (r"subprocess.*shell\s*=\s*True", "shell=True in subprocess"),  # noqa: SEC-012
-            (r"os\.system\s*\(", "os.system()"),  # noqa: SEC-012
-            (r"os\.popen\s*\(", "os.popen()"),  # noqa: SEC-012
+            (r"subprocess.*shell\s*=\s*True", "shell=True in subprocess"),  # noqa: SEC012
+            (r"os\.system\s*\(", "os.system()"),  # noqa: SEC012
+            (r"os\.popen\s*\(", "os.popen()"),  # noqa: SEC012
         ]
 
         for i, line in enumerate(lines, 1):
@@ -514,7 +514,7 @@ class SecurityValidator(BaseValidator):
     def _check_https_enforcement(self, file_path: Path, content: str, lines: list[str]):
         """SEC-034: Check for HTTP instead of HTTPS"""
         for i, line in enumerate(lines, 1):
-            if re.search(r"http://(?!localhost|127\.0\.0\.1|0\.0\.0\.0|\$)", line):
+            if re.search(r"http://(?!localhost|127\.0\.0\.1|0\.0\.0\.0|\$)", line):  # noqa: SEC034
                 if self._is_noqa_suppressed(line, "SEC-034") or "example.com" in line or "schemas" in line:
                     continue
                 if "http://www.w3.org" in line:
@@ -527,7 +527,7 @@ class SecurityValidator(BaseValidator):
                     line_number=i,
                     message="HTTP URL found - use HTTPS for security",
                     context=line.strip()[:80],
-                    suggestion="Replace http:// with https://",
+                    suggestion="Replace http:// with https://",  # noqa: SEC034
                 )
 
     def _check_timeout_configuration(self, file_path: Path, content: str, lines: list[str]):
@@ -648,7 +648,7 @@ class SecurityValidator(BaseValidator):
         """SEC-047: Check for disabled certificate verification"""
         patterns = [
             (r"verify\s*=\s*False", "SSL verification disabled"),
-            (r"CERT_NONE", "Certificate verification disabled"),
+            (r"CERT_NONE", "Certificate verification disabled"),  # noqa: SEC047
             (r"check_hostname\s*=\s*False", "Hostname verification disabled"),
         ]