Construct RTVI VSS CV Service

Scaffolds a deployable custom perception microservice that:

1. runs a DeepStream pipeline with YOLO26 primary inference + tracker,
2. converts detection metadata to the VSS protobuf schema and publishes it to the mdx-raw Kafka topic, and
3. drops into the existing VSS compose stack via the bp_developer_search_2d and bp_developer_alerts_2d_cv profile flags so the downstream Search Workflow, Alert Verification, and Behavior Analytics services consume it without further changes.

The scaffolded output is a runnable repo, not a design document.

Scope boundaries

This skill name describes the service type (a VSS-bound RTVI CV microservice), not a model family. What is generic vs YOLO26-specific: