How to run `google/fhir-data-pipes/pipelines/batch` uber JAR in Google Cloud Functions locally?

Start with the pipelines/batch entry point com.google.fhir.analytics.FhirEtl and the java-function-invoker command shown in the issue. Check how this target is exposed to Google Cloud Functions, how arguments are configured, and whether parallel invocations support different values; document the supported local invocation and configuration steps.

I tried the following command after building the uber JAR of google/fhir-data-pipes/pipelines/batch:

java -jar java-function-invoker-1.3.1.jar \
    --classpath /d/SourceCodes/google/fhir-data-pipes/pipelines/batch/target/batch-bundled.jar \
    --target com.google.fhir.analytics.FhirEtl

and here is the error logs:

2023-11-23 16:19:50.971:INFO::main: Logging initialized @96ms to org.eclipse.jetty.util.log.StdErrLog
Exception in thread "main" java.lang.RuntimeException: Could not determine function signature type from target com.google.fhir.analytics.FhirEtl. Either this should be a class implementing one of the interfaces in com.google.cloud.functions, or the environment variable FUNCTION_SIGNATURE_TYPE should be set to "http" or "event".
        at com.google.cloud.functions.invoker.runner.Invoker.servletForDeducedSignatureType(Invoker.java:393)
        at com.google.cloud.functions.invoker.runner.Invoker.startServer(Invoker.java:298)
        at com.google.cloud.functions.invoker.runner.Invoker.startServer(Invoker.java:244)
        at com.google.cloud.functions.invoker.runner.Invoker.main(Invoker.java:127)

Also, how to pass arguments to the uber JAR of the function in question? For example, if running the uber JAR directly, we can do it like this:

PATH_TO_THE_UBER_JAR=/d/SourceCodes/google/fhir-data-pipes/pipelines/batch/target/batch-bundled.jar && \
java -jar ${PATH_TO_THE_UBER_JAR} \
    --fhirServerUrl=http://fhir-server-bkkbn:8092/fhir \
    --resourceList=Patient,Practitioner \
    --fhirSinkPath=http://fhir-server-central:8098/fhir

More advanced, can we use Google Cloud Functions parallelism and supply different arguments values?