@Field
    public void setKeyPrefix(String keyPrefix) {
        this.parseStatusKey = keyPrefix + DEFAULT_PARSE_STATUS_KEY;
        this.parseTimeKey = keyPrefix + DEFAULT_PARSE_TIME_KEY;
        this.exitValueKey = keyPrefix + DEFAULT_EXIT_VALUE_KEY;
    }
This prefixes the keys before sending them to OpenSearch.
For example, "pdfinfo_", would have this reporter sending
"pdfinfo_status" and "pdfinfo_parse_time" to OpenSearch.
@param keyPrefix
tika-pipes/tika-pipes-reporters/tika-pipes-reporter-opensearch/src/main/java/org/apache/tika/pipes/reporters/opensearch/OpenSearchPipesReporter.java