[Feature Request] Improve SPARQL query performance

[xiazcy]

Community Note

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Graph Explorer Version (and Graph Database and Version used if applicable)

Is your feature request related to a problem? Please describe. We have observed SPARQL bug reports related to query execution and performance.

Describe the solution you'd like Review and make improvements to SPARQL query execution and performance.

Additional context Add any other context or screenshots about the feature request here. Describe any alternatives you've considered.

[xiazcy]

Relevant issue: https://github.com/aws/graph-explorer/issues/184