Node agent: say what it holds today in its answer, so a seed that holds the same is the same; pin mesh-sdk b03bf4c (issue 1126)

internal/selfcompose/selfcompose.go

@@ -17,6 +17,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"slices"
 	"sort"
 	"strings"
 	"sync"
@@ -100,6 +101,9 @@ type Composer struct {
 	sealedOwn map[string]ownSealed
 	said      string
 	refusal   string
+	// held is what the composer's last pass held: each module refused alone, and the node's own ("node") when it could
+	// compose none (heldNow).
+	held []string
 	// doing is what the composer waits on now (waiting), for a running answer to say (issue 1126, T2); its own lock, so
 	// it is read while c.mu is held.
 	doingMu sync.Mutex
@@ -621,12 +625,23 @@ func (c *Composer) refused(why string, held map[string]string) {
 	c.mu.Lock()
 	same := c.refusal == said
 	c.refusal = said
+	c.held = heldModules(held)
+	if why != "" {
+		c.held = append(c.held, delivery.HaveNodeWord)
+	}
 	c.mu.Unlock()
 	if !same && c.env.Refused != nil {
 		c.env.Refused(why, held)
 	}
 }
 
+// heldNow is what the composer's last pass held, sorted.
+func (c *Composer) heldNow() []string {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	return slices.Clone(c.held)
+}
+
 // keepRunning is comp with each sealed value the node already runs at the same slot kept, where it opens to the same
 // value (delivery.KeepSeals, issue 1126, C1): of what runs (running, the agent's), else of what its module's have says
 // it runs (Held). A have written before slots names no slot: its boxes are reused within their own module alone, at a