update

AzA march 2026/stripe_routes.py

@@ -465,6 +465,34 @@ def lookup_practice_id_for_license_email(email: str) -> Optional[str]:
         return None
 
 
+def lookup_license_email_for_practice(practice_id: str) -> Optional[str]:
+    """Liefert die zuletzt aktuelle Lizenz-/Kunden-E-Mail fuer eine Mandanten-practice_id."""
+    _ensure_storage()
+    pid = (practice_id or "").strip()
+    if not pid:
+        return None
+    try:
+        with sqlite3.connect(DB_PATH) as con:
+            row = con.execute(
+                """
+                SELECT customer_email FROM licenses
+                WHERE practice_id = ?
+                  AND customer_email IS NOT NULL
+                  AND trim(customer_email) != ''
+                  AND lower(trim(customer_email)) LIKE '%@%'
+                ORDER BY updated_at DESC
+                LIMIT 1
+                """,
+                (pid,),
+            ).fetchone()
+        if not row or not row[0]:
+            return None
+        em = str(row[0]).strip()
+        return em if em else None
+    except Exception:
+        return None
+
+
 def _upsert_license(
     *,
     subscription_id: str,