fix: use Ecosystem enum value in SerpApi query

Signed-off-by: Vladimir Belousov <vbelouso@redhat.com>

Author: vbelouso

src/vuln_analysis/utils/function_name_locator.py

@@ -291,7 +291,7 @@ async def quick_standard_lib_check(package_name: str, ecosystem: Ecosystem) -> b
     """
 
     search = MorpheusSerpAPIWrapper(max_retries=2)    
-    result = await search.arun(f"Is '{package_name}' part of the {ecosystem} standard library?")
+    result = await search.arun(f"Is '{package_name}' part of the {ecosystem.value} standard library?")
     logger.info("quick_standard_lib_check Standard library check result: %s", result)
 # Normalize result: if list, join into single string
     if isinstance(result, list):