feat(presidio): annotate the analyzer-result locals the token suffix reads

entity_type and value come out of an untyped analyzer mapping. They only fed
an f-string before, where an Any costs nothing; passing them to
_stable_token_suffix makes them call arguments, which is what the remaining
unknown-argument error was.

litellm/proxy/guardrails/guardrail_hooks/presidio.py

@@ -869,8 +869,10 @@ class _OPTIONAL_PresidioPIIMasking(CustomGuardrail):
         for ar in reversed(sorted_forward):
             start = ar["start"]
             end = ar["end"]
-            entity_type = ar["entity_type"]
-            value = text[start:end]
+            # Annotated because the analyzer result is an untyped mapping: both now
+            # reach _stable_token_suffix as call arguments, where an Any counts.
+            entity_type: str = ar["entity_type"]
+            value: str = text[start:end]
             suffix = (
                 self._stable_token_suffix(entity_type, value)
                 if self.presidio_stable_tokens