fix(cve): parse HTML instead of non-existent JSON API

- Debian Security Tracker has no public JSON API for individual CVEs
- Now fetches and parses the HTML page directly
- Searches for 'bookworm ... fixed' pattern in the vulnerability table
- Cache files changed from .json to .html

full_updater/backend/scanner.py

@@ -17,37 +17,41 @@ def _ensure_cve_api_cache() -> None:
     os.makedirs(CVE_API_CACHE, exist_ok=True)
 
 
-def _fetch_cve_status(cve_id: str) -> dict:
-    """Interroge l'API Debian Security Tracker pour une CVE, avec cache local."""
+def _fetch_cve_html(cve_id: str) -> str:
+    """Récupère le HTML de la page Debian Security Tracker pour une CVE."""
     _ensure_cve_api_cache()
-    cache_path = os.path.join(CVE_API_CACHE, f"{cve_id}.json")
+    cache_path = os.path.join(CVE_API_CACHE, f"{cve_id}.html")
 
     if os.path.exists(cache_path):
         try:
             with open(cache_path, "r", encoding="utf-8") as f:
-                return json.load(f)
+                return f.read()
         except Exception:
             pass
 
-    url = f"https://security-tracker.debian.org/tracker/{cve_id}/json"
+    url = f"https://security-tracker.debian.org/tracker/{cve_id}"
     try:
         req = urllib.request.Request(url, headers={"User-Agent": "full-updater/1.0"})
         with urllib.request.urlopen(req, timeout=15) as resp:
-            data = json.load(resp)
+            html = resp.read().decode("utf-8")
             with open(cache_path, "w", encoding="utf-8") as f:
-                json.dump(data, f)
-            return data
+                f.write(html)
+            return html
     except Exception:
-        return {}
+        return ""
 
 
 def _is_cve_actionable(cve_id: str, suite: str = "bookworm") -> bool:
-    """Retourne True si la CVE a un fixed_version pour le suite donné."""
-    data = _fetch_cve_status(cve_id)
-    cve_data = data.get(cve_id, {})
-    debian = cve_data.get("debian", {})
-    suite_data = debian.get(suite, {})
-    return suite_data.get("status") == "resolved" and "fixed_version" in suite_data
+    """Retourne True si la CVE est marquée 'fixed' pour le suite donné dans le HTML."""
+    html = _fetch_cve_html(cve_id)
+    if not html:
+        return False
+
+    # Chercher dans le tableau des packages vulnérables/fixed
+    # Pattern: suite (security)? version fixed
+    # Ex: bookworm 3.0.18-1~deb12u1 fixed
+    pattern = re.compile(rf"<td[^>]*>\s*{re.escape(suite)}\s*(?:\(security\))?\s*</td>\s*<td[^>]*>[^<]+</td>\s*<td[^>]*>\s*fixed\s*</td>", re.IGNORECASE)
+    return bool(pattern.search(html))
 
 
 def filter_actionable_cves(cves: list[dict]) -> tuple[list[dict], int]: