REST API Documentation: Health Checks

Use these in addition to local calls to `sudo docker compose ps`, `sudo docker stats`, and `sudo docker ps`. Additional services may be checked by non-public routes generally at `:8080/health'.

Route	Service	Example	Description
`caddy/health/`	`caddy`	`curl http://localhost/caddy/health/`	External reverse proxy
`healthz`	`nginx`	`curl http://localhost/healthz`	Internal proxy and static content
`ht/`	`caddy`, `nginx`	`curl http://localhost/ht/`	`Nexus CMS health`
`streamgl-gpu/primary/health`		`curl http://localhost/streamgl-gpu/primary/health`	GPU Visualization service controller
`streamgl-gpu/secondary/cpu/health`		`curl http://localhost/streamgl-gpu/secondary/cpu/health`	GPU Visualization service process (CPU-only)
`streamgl-gpu/secondary/gpu/health`		`curl http://localhost/streamgl-gpu/secondary/gpu/health`	GPU Visualization service process (GPU). WARNING: Check is resource-intensive.
`check-workers`	`streamgl-gpu`	`curl http://streamgl-gpu/check-workers`	Visualization service processes details (call from within Docker network)
`streamgl-viz/health`	`streamgl-viz`	`curl http://localhost/streamgl-viz/health`	Visualization web tier
`pivot/health`	`pivot`	`curl http://localhost/pivot/health`	Investigation automation service
`forge-etl/health`	`forge-etl`	`curl http://localhost/forge-etl/health`	Data pipeline middleware
`streamgl-sessions/health`	`streamgl-sessions`	`curl http://localhost/streamgl-sessions/health`	Session manager middleware
`streamgl-vgraph-etl/health`	`streamgl-vgraph-etl`	`curl http://localhost/streamgl-vgraph-etl/health`	1.0 API ingest and middleware (json, protobuf, keys)