feat(scheduling): multi-node service placement + remote lifecycle (#54)

* feat(scheduling): multi-node service placement + remote container lifecycle

services.node_id pins a service to a node agent: explicit id, "auto"
(least-loaded online node), or "local"/empty for the local Docker host.

- DeploymentEngine gains a NodeRunner seam; ReconcileService routes
  pinned services to the agent's command queue (create_container with
  image/env/command/ports/volumes/labels/resource limits), tracked in
  container_instances with deterministic per-replica ids.
- Stop/start/restart/delete fan out to the pinned node — no more leaked
  remote containers on service delete.
- Agent create_container is idempotent (rm -f first) and honors restart
  policy, labels, memory/cpus, published+ephemeral ports, volumes, env.
- GET /nodes/options exposes id/name/status to authed users; full agent
  management stays admin-only.
- CLI services create/update --node, MCP node_id docs, OpenAPI
  node_id/node_name + /nodes/options, service-detail Placement section.

Ceilings: remote nodes run registry-pulled images only — git builds,
Traefik domains, and remote sleep detection stay local until
build-on-node and per-node ingress land.

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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* feat(scheduling): node cordon/drain + schedulable gate

- node_agents.schedulable column; "auto" placement and explicit pins skip
  cordoned nodes; already-pinned services keep running (reconcile is
  unaffected — cordon is not eviction).
- POST /agents/:id/cordon|uncordon|drain (admin). Drain cordons, removes
  every service container via the agent queue, and clears the services'
  pins so they redeploy on the local host. Requires the node online —
  an offline node can't acknowledge removals.
- CLI nodes cordon|uncordon|drain (drain confirm-gated), MCP
  containr_nodes_cordon|uncordon|drain, OpenAPI paths + schedulable
  field, node-detail page cordon badge + drain/cordon controls.
- Fix: re-registering an agent no longer resets auto_prune.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* feat(scheduling): remote registry pulls + post-run health check

- Dispatch payload carries the project owner's registry credentials for
  the image host; the agent docker-logins for the pull and logs out
  after, so private images deploy to remote nodes.
- Completed command payloads get their registry password scrubbed —
  secrets don't linger in agent_commands rows.
- Agent verifies the container is still running ~1.5s after docker run;
  crash-loops now fail the deployment with the container's last log
  lines instead of reporting "running" optimistically.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

---------

Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

app/backend/internal/cli/commands/nodes.go

@@ -133,6 +133,63 @@ var nodesPruneCmd = &cobra.Command{
 	},
 }
 
+var nodesCordonCmd = &cobra.Command{
+	Use:   "cordon <id>",
+	Short: "Stop new placements on a node (running replicas stay)",
+	Args:  cobra.ExactArgs(1),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		c, err := client()
+		if err != nil {
+			return err
+		}
+		data, err := c.Do("POST", "/agents/"+args[0]+"/cordon", nil)
+		if err != nil {
+			return err
+		}
+		PrintRaw(data)
+		return nil
+	},
+}
+
+var nodesUncordonCmd = &cobra.Command{
+	Use:   "uncordon <id>",
+	Short: "Re-open a node for placement",
+	Args:  cobra.ExactArgs(1),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		c, err := client()
+		if err != nil {
+			return err
+		}
+		data, err := c.Do("POST", "/agents/"+args[0]+"/uncordon", nil)
+		if err != nil {
+			return err
+		}
+		PrintRaw(data)
+		return nil
+	},
+}
+
+var nodesDrainCmd = &cobra.Command{
+	Use:   "drain <id>",
+	Short: "Cordon a node, remove its service containers, unpin affected services",
+	Args:  cobra.ExactArgs(1),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		c, err := client()
+		if err != nil {
+			return err
+		}
+		if !Confirm(fmt.Sprintf("Drain node %s? Its service containers are removed and services unpinned (they redeploy locally).", args[0])) {
+			return &APIError{Message: "aborted (pass --yes to skip confirmation)", ExitCode: ExitError}
+		}
+		data, err := c.Do("POST", "/agents/"+args[0]+"/drain", nil)
+		if err != nil {
+			return err
+		}
+		PrintRaw(data)
+		return nil
+	},
+}
+
 var nodesCommandsCmd = &cobra.Command{
 	Use:   "commands <id>",
 	Short: "List recent commands sent to a node agent",
@@ -220,5 +277,5 @@ func init() {
 	nodesPruneCmd.Flags().String("until", "", "only prune objects older than this duration (e.g. 168h)")
 	nodesPruneCmd.Flags().Bool("volumes", false, "also prune volumes (destructive — asks twice)")
 	nodeTokensCmd.AddCommand(nodeTokensIssueCmd, nodeTokensListCmd, nodeTokensRevokeCmd)
-	NodesCmd.AddCommand(nodesListCmd, nodesGetCmd, nodesUpdateCmd, nodesPruneCmd, nodesCommandsCmd, nodesDeleteCmd, nodeTokensCmd)
+	NodesCmd.AddCommand(nodesListCmd, nodesGetCmd, nodesUpdateCmd, nodesCordonCmd, nodesUncordonCmd, nodesDrainCmd, nodesPruneCmd, nodesCommandsCmd, nodesDeleteCmd, nodeTokensCmd)
 }

app/backend/internal/cli/commands/services.go

@@ -60,7 +60,7 @@ var servicesGetCmd = &cobra.Command{
 			return nil
 		}
 		s, _ := unwrapObject(data, "service")
-		for _, k := range []string{"id", "name", "type", "status", "environment", "image", "git_repo", "git_branch", "domain", "port"} {
+		for _, k := range []string{"id", "name", "type", "status", "environment", "image", "git_repo", "git_branch", "domain", "port", "node_name"} {
 			fmt.Printf("%-14s %s\n", k+":", str(s, k))
 		}
 		return nil
@@ -79,7 +79,7 @@ var servicesCreateCmd = &cobra.Command{
 		body := map[string]interface{}{
 			"name": args[1],
 		}
-		for _, f := range []string{"type", "image", "git-repo", "git-branch", "build-path", "command", "environment", "domain", "restart-policy", "healthcheck-path", "cpu", "memory", "builder", "cpu-reserve", "memory-reserve", "static-cmd", "static-dir"} {
+		for _, f := range []string{"type", "image", "git-repo", "git-branch", "build-path", "command", "environment", "domain", "restart-policy", "healthcheck-path", "cpu", "memory", "builder", "cpu-reserve", "memory-reserve", "static-cmd", "static-dir", "node"} {
 			if v, _ := cmd.Flags().GetString(f); v != "" {
 				key := f
 				// JSON uses snake_case keys matching the API schema.
@@ -102,6 +102,8 @@ var servicesCreateCmd = &cobra.Command{
 					key = "static_build_cmd"
 				case "static-dir":
 					key = "static_dir"
+				case "node":
+					key = "node_id"
 				}
 				body[key] = v
 			}
@@ -159,7 +161,7 @@ var servicesUpdateCmd = &cobra.Command{
 			return err
 		}
 		body := map[string]interface{}{}
-		for _, f := range []string{"name", "image", "command", "domain", "restart-policy", "healthcheck-path", "cpu", "memory", "builder", "cpu-reserve", "memory-reserve", "static-cmd", "static-dir"} {
+		for _, f := range []string{"name", "image", "command", "domain", "restart-policy", "healthcheck-path", "cpu", "memory", "builder", "cpu-reserve", "memory-reserve", "static-cmd", "static-dir", "node"} {
 			if cmd.Flags().Changed(f) {
 				key := f
 				switch f {
@@ -175,6 +177,8 @@ var servicesUpdateCmd = &cobra.Command{
 					key = "static_build_cmd"
 				case "static-dir":
 					key = "static_dir"
+				case "node":
+					key = "node_id"
 				}
 				v, _ := cmd.Flags().GetString(f)
 				body[key] = v
@@ -490,6 +494,7 @@ func init() {
 	f.String("memory-reserve", "", "soft memory reservation (e.g. 128Mi)")
 	f.String("static-cmd", "", "build command for the static builder")
 	f.String("static-dir", "", "output dir for the static builder (default dist)")
+	f.String("node", "", "pin to a node agent id, or 'auto' for least-loaded (image services only)")
 
 	uf := servicesUpdateCmd.Flags()
 	uf.String("name", "", "service name")
@@ -514,6 +519,7 @@ func init() {
 	uf.String("static-dir", "", "output dir for the static builder (empty clears)")
 	uf.Bool("sleep", false, "enable scale-to-zero on idle (sleep mode)")
 	uf.Int("sleep-idle", 0, "idle minutes before sleeping (1-1440)")
+	uf.String("node", "", "pin to a node agent id, 'auto' for least-loaded, 'local' to clear")
 
 	for _, a := range []string{"start", "stop", "restart", "redeploy", "sleep", "wake"} {
 		verb := a