Fix duplicate documents in Bazel index aggregation #140

Job	Run time
Build scip-java CLI	5m 9s
maven-kotlin-json-kotlin-maven	2m 56s
gradle-kotlin-flowext	4m 0s
maven-java17-spring-boot	2m 43s
maven-java25-demo	2m 51s
gradle-mixed-okio-jmh	3m 37s
gradle-java21-readiness	2m 56s
gradle-kotlin-okio	3m 24s
bazel-java-examples	1m 35s
	29m 11s

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