[pgp] Fix pyright errors

pgp/backend/python_gnupg.py

@@ -59,7 +59,7 @@ class PGP(metaclass=Singleton):
         if result.ok:
             error = ""
         else:
-            error = result.status
+            error = result.status or "Unknown"
 
         return self._strip_header_footer(str(result)), error
 

typings/gnupg/__init__.pyi

@@ -105,6 +105,7 @@ class SearchKeys(StatusHandler, list[dict[Any, Any]]):
 class ListKeys(SearchKeys):
     UID_INDEX: int = ...
     FIELDS: list[str] = ...
+    fingerprints: list[str] = ...
     def __init__(self, gpg: GPG) -> None: ...
     def key(self, args: Any) -> None: ...
     sec: Any = ...
@@ -159,6 +160,7 @@ class TrustResult(DeleteResult): ...
 
 class Sign(StatusHandler, TextHandler):
     returncode: int | None = ...
+    status: str = ...
     def __init__(self, gpg: GPG) -> None: ...
     def __nonzero__(self) -> bool: ...
     def __bool__(self) -> bool: ...