Jev classifier in tandem with the LLM Sentry

- Jev (TypeSafe, direct) triages mode and task type with confidence
- Its call stands at >= 70% on both and no split; otherwise the LLM
  Sentry decides (unsure, split needs subtasks, or Jev down)
- Jev flights obey the same budget, flock cap, timeout and log
- Tests for every path; flight log is nil-safe
- start.command reads TYPESAFE_API_KEY and threshold from .env

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UQnSw4RRWp8uqpj3nsnnXF

server.go

@@ -78,6 +78,11 @@ func cmdServe(args []string) {
 	brain := NewBrain()
 	approver := NewWebApprover(*timeout)
 	p := &Pipeline{Flock: NewFlock(brain, g, flog), Ledger: ledger, Log: flog, G: g, Approver: approver}
+	jev := NewJev()
+	p.Flock.SetClassifier(jev)
+	if jev != nil {
+		fmt.Printf("Sentry triage: %s, LLM fallback\n", jev.Name())
+	}
 	s := NewServer(ctx, p, approver, nests)
 
 	srv := &http.Server{Addr: *addr, Handler: s.Handler(), ReadHeaderTimeout: 10 * time.Second}