fix(forge_health_check): exclude caches/venvs and false-positive file types

- Add EXCLUDED_PATH_SEGMENTS to skip .cache, __pycache__, .venv, venv,
  site-packages, node_modules, .git, .tox
- Exclude .css files and secret_scan tooling from sensitive-file scan
- Reduces noise from 13,449 false positives to 3 real findings

scripts/forge_health_check.py

@@ -98,9 +98,23 @@ class HealthReport:
             self.passed = False
 
 
+EXCLUDED_PATH_SEGMENTS = frozenset({
+    ".cache", "__pycache__", ".venv", "venv", "site-packages",
+    ".local/share/uv", "node_modules", ".git", ".tox",
+})
+
+
+def _is_excluded_path(path: Path) -> bool:
+    """Skip cache, venv, and package-manager directories."""
+    parts = set(path.parts)
+    return not parts.isdisjoint(EXCLUDED_PATH_SEGMENTS)
+
+
 def scan_orphaned_bytecode(root: Path, report: HealthReport) -> None:
     """Detect .pyc files without corresponding .py source files."""
     for pyc in root.rglob("*.pyc"):
+        if _is_excluded_path(pyc):
+            continue
         py = pyc.with_suffix(".py")
         if not py.exists():
             # Also check __pycache__ naming convention
@@ -142,6 +156,12 @@ def _is_sensitive_filename(name: str) -> bool:
     lower = name.lower()
     if lower == ".env.example":
         return False
+    # Skip stylesheet and documentation artifacts
+    if lower.endswith(".css"):
+        return False
+    # Skip scanner tooling — these are detectors, not secrets
+    if lower in {"secret_scan.py", "secret_scanner.py"}:
+        return False
     if any(pat in lower for pat in SENSITIVE_FILE_PATTERNS):
         return True
     if any(lower.startswith(pref) for pref in SENSITIVE_NAME_PREFIXES):
@@ -156,6 +176,8 @@ def scan_sensitive_file_permissions(root: Path, report: HealthReport, fix: bool
     for fpath in root.rglob("*"):
         if not fpath.is_file():
             continue
+        if _is_excluded_path(fpath):
+            continue
         # Skip test files — real secrets should never live in tests/
         if "/tests/" in str(fpath) or str(fpath).startswith(str(root / "tests")):
             continue