Add starbuck and apollo as active/active app hosts (#21)

## Summary

- Closes [#20](#20).
- Register **starbuck** (`10.0.0.44`) and **apollo** (`10.0.0.7`) as Proxmox app hosts in `webservers`, with `host_apps` copied from **roslin** (same apps/ports; **no** `monica_site` worker — that stays a singleton on **adama**).
- Allow `starbuck` / `apollo` in `provision.sh` and `deploy.sh`; document inventory, NPM backends, and Alloy `host` labels.

## Test plan

- [ ] `ansible-inventory --list` shows both hosts under `webservers` at the expected IPs.
- [ ] Bootstrap SSH + passwordless sudo on each VM (keep a Proxmox console open for first UFW enable).
- [ ] `ansible starbuck,apollo -m ping`
- [ ] `./scripts/provision.sh starbuck --check` then `./scripts/provision.sh starbuck`
- [ ] `./scripts/provision.sh apollo --check` then `./scripts/provision.sh apollo`
- [ ] `./scripts/deploy.sh starbuck` and `./scripts/deploy.sh apollo` bring up the same app+env set as roslin.
- [ ] `monica_site` dj-queue worker still runs **only** on adama.
- [ ] Grafana/Loki show `host="starbuck"` and `host="apollo"`.
- [ ] NPM Advanced upstreams (manual): add `starbuck:PORT` and `apollo:PORT` beside adama/roslin.Reviewed-on: #21

README.md

@@ -11,6 +11,8 @@ ansible-galaxy collection install -r requirements.yml
 # Bootstrap SSH key to each host (one-time, before Ansible)
 ssh-copy-id westfarn@10.0.0.77
 ssh-copy-id westfarn@10.0.0.176
+ssh-copy-id westfarn@10.0.0.44
+ssh-copy-id westfarn@10.0.0.7
 
 # First-time only: passwordless sudo on each new host (before first provision)
 ssh -t westfarn@10.0.0.176   # repeat for each host IP
@@ -46,4 +48,6 @@ the central **Loki / Prometheus / Grafana** stack (`observability_stack: true`).
 |------|-----|------|
 | adama | 10.0.0.77 | app host |
 | roslin | 10.0.0.176 | app host |
+| starbuck | 10.0.0.44 | app host |
+| apollo | 10.0.0.7 | app host |
 | ai-server-4080 | 10.0.0.128 | control node + act runner |