fix: Resolve issue with parameter caching for engine creation (#2004)

<!-- .github/pull_request_template.md -->

## Description
Resolve issues with parameter caching for engine creation by making sure
parameters are always called in the same order with the default values
fixed

## Acceptance Criteria
<!--
* Key requirements to the new feature or modification;
* Proof that the changes work and meet the requirements;
* Include instructions on how to verify the changes. Describe how to
test it locally;
* Proof that it's sufficiently tested.
-->

## Type of Change
<!-- Please check the relevant option -->
- [ ] Bug fix (non-breaking change that fixes an issue)
- [ ] New feature (non-breaking change that adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
- [ ] Code refactoring
- [ ] Performance improvement
- [ ] Other (please specify):

## Screenshots/Videos (if applicable)
<!-- Add screenshots or videos to help explain your changes -->

## Pre-submission Checklist
<!-- Please check all boxes that apply before submitting your PR -->
- [ ] **I have tested my changes thoroughly before submitting this PR**
- [ ] **This PR contains minimal changes necessary to address the
issue/feature**
- [ ] My code follows the project's coding standards and style
guidelines
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have added necessary documentation (if applicable)
- [ ] All new and existing tests pass
- [ ] I have searched existing PRs to ensure this change hasn't been
submitted already
- [ ] I have linked any relevant issues in the description
- [ ] My commits have clear and descriptive messages

## DCO Affirmation
I affirm that all code in every commit of this pull request conforms to
the terms of the Topoteretes Developer Certificate of Origin.

cognee/infrastructure/databases/graph/get_graph_engine.py

@@ -24,7 +24,6 @@ async def get_graph_engine() -> GraphDBInterface:
     return graph_client
 
 
-@lru_cache
 def create_graph_engine(
     graph_database_provider,
     graph_file_path,
@@ -35,6 +34,35 @@ def create_graph_engine(
     graph_database_port="",
     graph_database_key="",
     graph_dataset_database_handler="",
+):
+    """
+    Wrapper function to call create graph engine with caching.
+    For a detailed description, see _create_graph_engine.
+    """
+    return _create_graph_engine(
+        graph_database_provider,
+        graph_file_path,
+        graph_database_url,
+        graph_database_name,
+        graph_database_username,
+        graph_database_password,
+        graph_database_port,
+        graph_database_key,
+        graph_dataset_database_handler,
+    )
+
+
+@lru_cache
+def _create_graph_engine(
+    graph_database_provider,
+    graph_file_path,
+    graph_database_url="",
+    graph_database_name="",
+    graph_database_username="",
+    graph_database_password="",
+    graph_database_port="",
+    graph_database_key="",
+    graph_dataset_database_handler="",
 ):
     """
     Create a graph engine based on the specified provider type.

cognee/infrastructure/databases/vector/create_vector_engine.py

@@ -7,7 +7,6 @@ from cognee.infrastructure.databases.graph.config import get_graph_context_confi
 from functools import lru_cache
 
 
-@lru_cache
 def create_vector_engine(
     vector_db_provider: str,
     vector_db_url: str,
@@ -15,6 +14,29 @@ def create_vector_engine(
     vector_db_port: str = "",
     vector_db_key: str = "",
     vector_dataset_database_handler: str = "",
+):
+    """
+    Wrapper function to call create vector engine with caching.
+    For a detailed description, see _create_vector_engine.
+    """
+    return _create_vector_engine(
+        vector_db_provider,
+        vector_db_url,
+        vector_db_name,
+        vector_db_port,
+        vector_db_key,
+        vector_dataset_database_handler,
+    )
+
+
+@lru_cache
+def _create_vector_engine(
+    vector_db_provider: str,
+    vector_db_url: str,
+    vector_db_name: str,
+    vector_db_port: str = "",
+    vector_db_key: str = "",
+    vector_dataset_database_handler: str = "",
 ):
     """
     Create a vector database engine based on the specified provider.

cognee/tests/test_permissions.py

@@ -41,14 +41,14 @@ async def _reset_engines_and_prune() -> None:
     except Exception:
         pass
 
-    from cognee.infrastructure.databases.graph.get_graph_engine import create_graph_engine
     from cognee.infrastructure.databases.relational.create_relational_engine import (
         create_relational_engine,
     )
-    from cognee.infrastructure.databases.vector.create_vector_engine import create_vector_engine
+    from cognee.infrastructure.databases.vector.create_vector_engine import _create_vector_engine
+    from cognee.infrastructure.databases.graph.get_graph_engine import _create_graph_engine
 
-    create_graph_engine.cache_clear()
-    create_vector_engine.cache_clear()
+    _create_graph_engine.cache_clear()
+    _create_vector_engine.cache_clear()
     create_relational_engine.cache_clear()
 
     await cognee.prune.prune_data()

cognee/tests/test_search_db.py

@@ -48,14 +48,14 @@ async def _reset_engines_and_prune() -> None:
         # Engine might not exist yet
         pass
 
-    from cognee.infrastructure.databases.graph.get_graph_engine import create_graph_engine
-    from cognee.infrastructure.databases.vector.create_vector_engine import create_vector_engine
+    from cognee.infrastructure.databases.graph.get_graph_engine import _create_graph_engine
+    from cognee.infrastructure.databases.vector.create_vector_engine import _create_vector_engine
     from cognee.infrastructure.databases.relational.create_relational_engine import (
         create_relational_engine,
     )
 
-    create_graph_engine.cache_clear()
-    create_vector_engine.cache_clear()
+    _create_graph_engine.cache_clear()
+    _create_vector_engine.cache_clear()
     create_relational_engine.cache_clear()
 
     await cognee.prune.prune_data()