upkeep: rethink how pacta-data gets volume mounted in docker-compose.yml

[jdhoffa]

.env is used mainly to set R_CONFIG_ACTIVE and file paths. However, this R_CONFIG_ACTIVE parameter is mis-used a little to also set the target mount directory in the docker-compose.yml:

workflow.prepare.pacta.indices/docker-compose.yml

Line 12 in fd12213

target: /pacta-data/${R_CONFIG_ACTIVE}

This is not really ideal, in case you want to set a project specific config (e.g. PA2023CH) that still uses 2023Q4 data

[jdhoffa]

Oops lol closing in favour of #63