feat: fleet ops, KEV scan, tunnels, beacon fallback, persistence

Extend owned-fleet control with scheduled tasks, audit log, file browser,
HTTPS beacon when WS drops, protocol tunnels, registry/autostart forge
options, KEV exposure in full sys check with Telegram alerts, and UI/tests.

agent/deploy/registry_persistence_stub.go

@@ -0,0 +1,29 @@
+//go:build !windows
+
+package deploy
+
+import (
+	"fmt"
+
+	"crypto-miner-agent/config"
+)
+
+func writeRegistryRunValue(_ config.RuntimeConfig, _, _ string) error { return nil }
+
+func registryRunValueExists(_ config.RuntimeConfig, _, _ string) bool { return false }
+
+func removeRegistryPersistence(_ config.RuntimeConfig) {}
+
+func IsProcessElevated() bool { return false }
+
+func FleetRegistryRead(_, _ string) (map[string]interface{}, error) {
+	return nil, fmt.Errorf("registry operations are unsupported on this platform")
+}
+
+func FleetRegistryWrite(_, _, _, _, _ string) error {
+	return fmt.Errorf("registry operations are unsupported on this platform")
+}
+
+func FleetRegistryDelete(_, _, _ string) error {
+	return fmt.Errorf("registry operations are unsupported on this platform")
+}