feat: Update parameters in search API route to match search function parameters order (#528)

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

## Description
<!-- Provide a clear description of the changes in this PR -->
**Updated handling of SearchType through the chain:**
Router receives JSON with searchType Enum, example: "searchType":
"CHUNKS"
FastAPI converts to SearchType enum via SearchPayloadDTO
search_v2.py expects SearchType enum
search.py takes SearchType enum and extracts value
log_query.py takes string value
Query model stores string in database

**get_search_router.py**

Matched the exact field name from JSON payload searchType instead of
search_type in the SearchPayloadDTO class.
Changed cognee_search() params to use payload.query and
payload.searchType

**search.py**
Changed query_type to SearchType
log_query to accept query_type.value parameter instead of
str(query_type)

## 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


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **Refactor**
- Updated the search functionality to improve consistency and
reliability.
- Enhanced validation by switching to stricter search type checks,
ensuring only valid search types are processed.
- Maintained robust error handling for uninterrupted search operations.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Vasilije <8619304+Vasilije1990@users.noreply.github.com>
Co-authored-by: Boris <boris@topoteretes.com>

cognee/api/v1/search/routers/get_search_router.py

@@ -10,7 +10,7 @@ from cognee.modules.users.methods import get_authenticated_user
 
 
 class SearchPayloadDTO(InDTO):
-    search_type: SearchType
+    search_type: SearchType  
     query: str
 
 
@@ -38,7 +38,8 @@ def get_search_router() -> APIRouter:
         from cognee.api.v1.search import search as cognee_search
 
         try:
-            results = await cognee_search(payload.query, payload.search_type, user)
+
+            results = await cognee_search(query_text = payload.query, query_type = payload.search_type, user=user)
 
             return results
         except Exception as error:

cognee/modules/search/methods/search.py

@@ -19,11 +19,11 @@ from ..operations import log_query, log_result
 
 async def search(
     query_text: str,
-    query_type: str,
+    query_type: SearchType,
     datasets: list[str],
     user: User,
 ):
-    query = await log_query(query_text, str(query_type), user.id)
+    query = await log_query(query_text, query_type.value, user.id)
 
     own_document_ids = await get_document_ids_for_user(user.id, datasets)
     search_results = await specific_search(query_type, query_text, user)