G sessions: the runner serves a bundle's put and get sessions and states put-sessions

A value over buscalls.ChunkBytes is put by mesh/objects.put-chunk (written into the module's store as each chunk is
taken, sealed on the last, dropped at its bound or a disorder) and got by mesh/objects.get-chunk after a chunked answer,
for a state's object and a sent object alike; the 8 MiB BundleObjectMost cap is gone with the stateobjects constant.

Builds: design 47 G §518, §345, §457, §490, §620, §622, A-21, A-25
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h

node-tools/internal/bus/sent.go

@@ -17,24 +17,11 @@ import (
 // bindings alone. It reads as this connection's account, which the bus lets read a sender's sent store only where the
 // grants part granted it (a bundle is held to what its runtime channel carries by the runtime call, not here), from the manifests' callers and consumers; a refusal says the store.
 func (c *Conn) SentGet(r buscalls.ObjectsSentGetRequest) (*buscalls.ObjectData, error) {
-	ref := stateobjects.Ref{Store: r.Store, Object: r.Object, Size: r.Size, Digest: r.Digest, Form: stateobjects.FormVersion}
-	if _, ok := stateobjects.ReadRef(stateobjects.Wrap(ref)); !ok {
-		return nil, errors.New("a sent object is named by the reference's store, object, size and sha256, as the reply or event carried them")
-	}
-	if !strings.HasSuffix(r.Store, catalogue.BusNameSeparator+catalogue.SentObjectsLocal) {
-		return nil, fmt.Errorf("%s is no sent store (a module's is `<module>%s%s`): only a sent object is read by its reference",
-			r.Store, catalogue.BusNameSeparator, catalogue.SentObjectsLocal)
-	}
-	js, err := c.JetStream()
-	if err != nil {
-		return nil, err
-	}
 	ctx, cancel := context.WithTimeout(context.Background(), StateTimeout)
 	defer cancel()
-	obs, err := js.ObjectStore(ctx, r.Store)
+	obs, err := c.sentStore(ctx, r)
 	if err != nil {
-		return nil, fmt.Errorf("the sent store %s cannot be read as %s: it is not on the bus, or the bus grants this account no "+
-			"read of it (the manifests' callers and consumers are granted): %w", r.Store, c.cred.Module, err)
+		return nil, err
 	}
 	info, err := obs.GetInfo(ctx, r.Object)
 	if errors.Is(err, jetstream.ErrObjectNotFound) {
@@ -49,3 +36,25 @@ func (c *Conn) SentGet(r buscalls.ObjectsSentGetRequest) (*buscalls.ObjectData,
 	}
 	return &buscalls.ObjectData{Info: objectInfoOf(info), Data: data}, nil
 }
+
+// sentStore checks the reference r and opens the sender's sent store it names.
+func (c *Conn) sentStore(ctx context.Context, r buscalls.ObjectsSentGetRequest) (jetstream.ObjectStore, error) {
+	ref := stateobjects.Ref{Store: r.Store, Object: r.Object, Size: r.Size, Digest: r.Digest, Form: stateobjects.FormVersion}
+	if _, ok := stateobjects.ReadRef(stateobjects.Wrap(ref)); !ok {
+		return nil, errors.New("a sent object is named by the reference's store, object, size and sha256, as the reply or event carried them")
+	}
+	if !strings.HasSuffix(r.Store, catalogue.BusNameSeparator+catalogue.SentObjectsLocal) {
+		return nil, fmt.Errorf("%s is no sent store (a module's is `<module>%s%s`): only a sent object is read by its reference",
+			r.Store, catalogue.BusNameSeparator, catalogue.SentObjectsLocal)
+	}
+	js, err := c.JetStream()
+	if err != nil {
+		return nil, err
+	}
+	obs, err := js.ObjectStore(ctx, r.Store)
+	if err != nil {
+		return nil, fmt.Errorf("the sent store %s cannot be read as %s: it is not on the bus, or the bus grants this account no "+
+			"read of it (the manifests' callers and consumers are granted): %w", r.Store, c.cred.Module, err)
+	}
+	return obs, nil
+}