Remove Dgraph support from the codebase.

Dgraph-related functionality, configuration, and benchmarks have been removed from the project. This streamlines the codebase to focus on supported backends, specifically eliminating Dgraph references in favor of Neo4j and other implementations. Version bumped to reflect the changes.

pkg/neo4j/logger.go

@@ -10,7 +10,7 @@ import (
 	"lol.mleku.dev/log"
 )
 
-// NewLogger creates a new dgraph logger.
+// NewLogger creates a new neo4j logger.
 func NewLogger(logLevel int, label string) (l *logger) {
 	l = &logger{Label: label}
 	l.Level.Store(int32(logLevel))