community[patch]: Add missing annotations (#24890)

This PR adds annotations in comunity package.

Annotations are only strictly needed in subclasses of BaseModel for
pydantic 2 compatibility.

This PR adds some unnecessary annotations, but they're not bad to have
regardless for documentation pages.

libs/community/langchain_community/utilities/redis.py

@@ -28,7 +28,7 @@ class TokenEscaper:
 
     # Characters that RediSearch requires us to escape during queries.
     # Source: https://redis.io/docs/stack/search/reference/escaping/#the-rules-of-text-field-tokenization
-    DEFAULT_ESCAPED_CHARS = r"[,.<>{}\[\]\\\"\':;!@#$%^&*()\-+=~\/ ]"
+    DEFAULT_ESCAPED_CHARS: str = r"[,.<>{}\[\]\\\"\':;!@#$%^&*()\-+=~\/ ]"
 
     def __init__(self, escape_chars_re: Optional[Pattern] = None):
         if escape_chars_re: