fix(docker): override image healthcheck to the configured port

The ghcr.io llama.cpp image bakes in a HEALTHCHECK that curls port 8080
(the llama.cpp default). When the server runs on a different --port (here
8000), that check always fails and Docker reports the container as
"unhealthy" even though it serves fine. Override the healthcheck in the
docker run command to target the configured container_port/health_endpoint,
with a 300s start-period so large-context model loads don't flap.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/test_docker_ops.py

@@ -126,6 +126,16 @@ def test_build_run_command_contains_key_flags():
     assert "--cont-batching" in cmd
 
 
+def test_build_run_command_overrides_healthcheck_to_configured_port():
+    cfg = make_cfg()
+    cmd = build_run_command(cfg)
+    assert "--health-cmd" in cmd
+    # healthcheck must target the configured container_port (8000), not the
+    # image default (8080), and hit the configured health endpoint.
+    assert "curl -f http://localhost:8000/health || exit 1" in cmd
+    assert "--health-start-period" in cmd
+
+
 def test_build_run_command_expose_binds_all_interfaces():
     cfg = make_cfg(expose=True)
     cmd = build_run_command(cfg)