add build endpoint for nemoretriever-parse

[edknv]

Description

nemoretriever-parse is available now at https://build.nvidia.com/nvidia/nemoretriever-parse

This PR adds the build endpoint to docker-compose.yaml (commented out) and also adds the model name environment variable as configurable.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.
• If adjusting docker-compose.yaml environment variables have you ensured those are mimicked in the Helm values.yaml file.

[jdye64]

Looks good. Thanks @edknv