Reuse stored managed-NE credentials when opening WebCRT from topology.

Deep-link open was missing has_password/protocol, so SSH always prompted for login.

Co-authored-by: Cursor <cursoragent@cursor.com>

netx_api/ne_schemas.py

@@ -89,6 +89,8 @@ class ManagedNeOut(BaseModel):
     port: int
     protocol: str
     username: str
+    # True when a non-empty password ciphertext is stored (never returns the secret).
+    has_password: bool = False
     connect_status: ConnectStatus
     connect_message: str
     connect_detail: str = ""