issue: #43767
- Enhance serviceable check logic to properly handle full vs partial
result requirements
- For full result (requiredLoadRatio >= 1.0): check
queryView.Serviceable()
- For partial result (requiredLoadRatio < 1.0): check load ratio
satisfaction
- Add comprehensive unit tests covering all serviceable check scenarios
This enhancement ensures delegator correctly validates serviceability
based on the requested result completeness, improving reliability of
query operations.
Signed-off-by: Wei Liu <wei.liu@zilliz.com>