[DE-1071] Filter pushdown #20
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This PR implements filter pushdown optimization for ArangoDB TinkerPop integration by translating Gremlin predicates into AQL queries. The implementation adds query optimization to reduce data transfer and improve performance.
This PR implements the push down only for filters of type:
org.apache.tinkerpop.gremlin.process.traversal.step.filter.HasStep.For example this optimizes queries like
g.V().has("value", "foo"), by reading from the database only the matching vertices.