feat(boss): Chief of Staff Boss + spun-crow registry with cap (#42)

guardrails.go

@@ -18,6 +18,7 @@ type Guardrails struct {
 	MaxRequestsPerMin  int           // requester rate cap
 	BaseCooldown       time.Duration // first offense cooldown; doubles per strike
 	MaxCooldown        time.Duration
+	MaxSpunCrows       int // crow registry cap: crows the Boss may spin up
 }
 
 func DefaultGuardrails() Guardrails {
@@ -34,5 +35,6 @@ func DefaultGuardrails() Guardrails {
 		MaxRequestsPerMin:  5,
 		BaseCooldown:       30 * time.Second,
 		MaxCooldown:        time.Hour,
+		MaxSpunCrows:       8,
 	}
 }