Add hosted judge deployment artifact

[c-mongan]

Summary

• add a deployable hosted llm-judge service for benchmark semantic checks
• add an Azure Container Apps Bicep module and Dockerfile for the service
• update benchmark judge-provider guidance, product audit coverage, and product audit docs

Verification

• npm --prefix benchmark-judges/hosted-judge test
• npm --prefix agentops-cli test
• npm --prefix actioner test
• node agentops-cli/src/index.js product audit --json
• node agentops-cli/src/index.js demo verify --runs 50 --json
• az bicep build --file infra/bicep/hosted-judge.bicep --stdout
• git diff --check