Jarvis pkg conf resets other parameter to default values #49
Description
Description
When configuring the Gray-Scott pipeline using Jarvis, updating the parameter L unintentionally resets the ADIOS2 engine from hermes to the default value bp5.
Steps to Reproduce
Configure the pipeline with engine=hermes.
Run the following command to update only the L value:
jarvis pkg conf coeus-gray-scott.jarvis_coeus.adios2_gray_scott L=64
Inspect the resulting configuration.
Observed Behavior
The parameter L is correctly updated to 64.
The ADIOS2 engine is unexpectedly changed from hermes to bp5 (default).
Expected Behavior
Updating a single parameter (e.g., L) should preserve existing configuration values, including engine=hermes.
The engine should remain unchanged unless explicitly overridden.