fix(vps): M1 mitigation — NODE_TYPE=lte_node disables unfiltered prune

node-agent calls docker containers.prune() with no filters every
CHECK_INTERVAL (60 s on VPS). The Docker API removes EVERY non-running
container regardless of RestartPolicy or compose labels — this destroyed
ollama@solaria on 2026-07-30 (19 s after an operator `docker stop`).

On VPS the blast radius is worse: humanai-mailer and humanai-landing have
no compose definition in this repo (recreated by hand from `docker inspect`),
so a pruned container there is an irreversible loss of the only config source.

self.node_type is read only by run_safe_cleanup() (node_agent.py:648,654) and
two log lines (250, 1103). Verified additionally for VPS: the control-plane
filesystem rotation and health probe in run_once() are gated on
`node_name == VPS_NODE_NAME`, not node_type — so they keep running. Monitoring,
event shipping and action dispatch are likewise unaffected.

Temporary — remove once R1 (explicit-enumeration prune) is deployed.
Refs docs/incidents/2026-07-30-ollama-solaria-vanish.md §7 M1.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

hosts/vps/runtime/node-agent/docker-compose.override.yml

@@ -3,6 +3,18 @@ services:
     environment:
       - NODE_NAME=vps
       - CHECK_INTERVAL=60
+      # TEMPORARY mitigation (M1) for the unfiltered-prune incident
+      # (docs/incidents/2026-07-30-ollama-solaria-vanish.md §7). node-agent runs
+      # `docker container prune()` with NO filters every CHECK_INTERVAL, and the
+      # Docker API removes EVERY non-running container regardless of restart
+      # policy or compose labels — this already destroyed ollama@solaria. On VPS
+      # the loss is worse: humanai-mailer and humanai-landing have no compose
+      # definition in this repo, so a pruned container cannot be recreated.
+      # node_type is read ONLY by run_safe_cleanup() (plus two log lines), so
+      # lte_node disables cleanup and nothing else — monitoring, event shipping
+      # and action dispatch keep working.
+      # REMOVE once R1 (explicit-enumeration prune) is deployed to VPS.
+      - NODE_TYPE=lte_node
     # host network mode: node-agent on VPS shares the host's network namespace
     # so that localhost:18180 resolves to the control-plane's exposed port.
     # Without this, localhost inside the container is the container's own loopback