fix breakage when cloning agent/crew using knowledge_sources and enable custom knowledge_storage (#1927)

* fix breakage when cloning agent/crew using knowledge_sources

* fixed typo

* better

* ensure use of other knowledge storage works

* fix copy and custom storage

* added tests

* normalized name

* updated cassette

* fix test

* remove fixture

* fixed test

* fix

* add fixture to this

* add fixture to this

* patch twice since

* fix again

* with fixtures

* better mocks

* fix

* simple

* try

* another

* hopefully fixes test

* hopefully fixes test

* this should fix it !

* WIP: test check with prints

* try this

* exclude knowledge

* fixes

* just drop clone for now

* rm print statements

* printing agent_copy

* checker

* linted

* cleanup

* better docs

---------

Co-authored-by: Brandon Hancock (bhancock_ai) <109994880+bhancockio@users.noreply.github.com>

src/crewai/knowledge/source/base_file_knowledge_source.py

@@ -29,7 +29,13 @@ class BaseFileKnowledgeSource(BaseKnowledgeSource, ABC):
     def validate_file_path(cls, v, info):
         """Validate that at least one of file_path or file_paths is provided."""
         # Single check if both are None, O(1) instead of nested conditions
-        if v is None and info.data.get("file_path" if info.field_name == "file_paths" else "file_paths") is None:
+        if (
+            v is None
+            and info.data.get(
+                "file_path" if info.field_name == "file_paths" else "file_paths"
+            )
+            is None
+        ):
             raise ValueError("Either file_path or file_paths must be provided")
         return v