G findings: the runner's first views write their unanswered finding through one held writer over its own connection

bus.Conn gains its one JetStream accessor; firstview keeps the runner's own consumer and its four followers and writes and clears each follower's first-view-unanswered finding with the contract's Finding.

Builds: design 47 G A-27, A-28, A-16, A-29

node-tools/internal/firstview/firstview_integration_test.go

@@ -11,6 +11,7 @@ import (
 	"testing"
 	"time"
 
+	condseat "git.novox.be/novox/mesh-contracts/health-and-repair/go/seats/meshconditions"
 	"git.novox.be/novox/mesh-sdk/go/catalogue"
 	"git.novox.be/novox/mesh-sdk/go/process"
 	"git.novox.be/novox/mesh-sdk/go/views"
@@ -84,10 +85,10 @@ func TestTheRunnersConsumerCarriesTheOwnersViewsFamiliesWhenTheOwnersAreDownThen
 
 	var mu sync.Mutex
 	findings := map[string]bool{}
-	deps := DepsOf(conn)
+	deps := DepsOf(conn, t.Logf)
 	deps.Bound, deps.Wait = 100*time.Millisecond, 20*time.Millisecond
-	deps.PutFinding = func(key string, _ json.RawMessage) error { mu.Lock(); findings[key] = true; mu.Unlock(); return nil }
-	deps.DeleteFinding = func(key string) error { mu.Lock(); delete(findings, key); mu.Unlock(); return nil }
+	deps.Findings = writes{&mu, findings}
+	deps.StartFindings = nil
 	v, stop := StartWith(context.Background(), deps, func(string, ...any) {})
 	t.Cleanup(stop)
 
@@ -156,3 +157,23 @@ func TestTheRunnersConsumerCarriesTheOwnersViewsFamiliesWhenTheOwnersAreDownThen
 type errFindings int
 
 func (e errFindings) Error() string { return "not yet" }
+
+// writes is the runner's finding writer in this test: the findings written and not cleared.
+type writes struct {
+	mu *sync.Mutex
+	by map[string]bool
+}
+
+func (w writes) Write(_ context.Context, f condseat.Finding) error {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	w.by[views.FindingKey(f.Scope, f.ID, f.Kind)] = true
+	return nil
+}
+
+func (w writes) Clear(_ context.Context, scope, id, kind, _ string) error {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	delete(w.by, views.FindingKey(scope, id, kind))
+	return nil
+}