feat(search): adds exception for text exceeding embedding limit

Introduces InputTooLongError, a subclass of SyntaxQueryError, to handle cases where input text exceeds the MAX_EMBEDDING_CHAR_LENGTH limit during embedding preparation.

Author: ERosendo

cl/search/exception.py

@@ -1,6 +1,7 @@
 from enum import Enum
 from http import HTTPStatus
 
+from django.conf import settings
 from elasticsearch.exceptions import SerializationError
 from rest_framework.exceptions import APIException
 
@@ -68,3 +69,12 @@ class InvalidRelativeDateSyntax(SyntaxQueryError):
     """The date entered has an invalid format."""
 
     message = "The date entered has an invalid format."
+
+
+class InputTooLongError(SyntaxQueryError):
+    """The input text is too long to be processed for embedding."""
+
+    message = (
+        "The input is too long to process. The maximum allowed is "
+        f"{settings.MAX_EMBEDDING_CHAR_LENGTH} characters."
+    )