[feature] Read + Write tombstones for deleted Actors (#1005)

* [feature] Read + Write tombstones for deleted Actors

* copyTombstone

* update to use resultcache instead of old ttl cache

Signed-off-by: kim <grufwub@gmail.com>

* update go-cache library to fix result cache capacity / ordering bugs

Signed-off-by: kim <grufwub@gmail.com>

* bump go-cache/v3 to v3.1.6 to fix bugs

Signed-off-by: kim <grufwub@gmail.com>

* switch on status code

* better explain ErrGone reasoning

Signed-off-by: kim <grufwub@gmail.com>
Co-authored-by: kim <grufwub@gmail.com>

vendor/codeberg.org/gruf/go-mangler/helpers.go

@@ -0,0 +1,97 @@
+package mangler
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+func deref_ptr_mangler(mangle Mangler, count int) rMangler {
+	return func(buf []byte, v reflect.Value) []byte {
+		for i := 0; i < count; i++ {
+			// Check for nil
+			if v.IsNil() {
+				buf = append(buf, '0')
+				return buf
+			}
+
+			// Further deref ptr
+			buf = append(buf, '1')
+			v = v.Elem()
+		}
+
+		// Mangle fully deref'd ptr
+		return mangle(buf, v.Interface())
+	}
+}
+
+func deref_ptr_rmangler(mangle rMangler, count int) rMangler {
+	return func(buf []byte, v reflect.Value) []byte {
+		for i := 0; i < count; i++ {
+			// Check for nil
+			if v.IsNil() {
+				buf = append(buf, '0')
+				return buf
+			}
+
+			// Further deref ptr
+			buf = append(buf, '1')
+			v = v.Elem()
+		}
+
+		// Mangle fully deref'd ptr
+		return mangle(buf, v)
+	}
+}
+
+func iter_array_mangler(mangle Mangler) rMangler {
+	return func(buf []byte, v reflect.Value) []byte {
+		n := v.Len()
+		for i := 0; i < n; i++ {
+			buf = mangle(buf, v.Index(i).Interface())
+			buf = append(buf, ',')
+		}
+		if n > 0 {
+			buf = buf[:len(buf)-1]
+		}
+		return buf
+	}
+}
+
+func iter_array_rmangler(mangle rMangler) rMangler {
+	return func(buf []byte, v reflect.Value) []byte {
+		n := v.Len()
+		for i := 0; i < n; i++ {
+			buf = mangle(buf, v.Index(i))
+			buf = append(buf, ',')
+		}
+		if n > 0 {
+			buf = buf[:len(buf)-1]
+		}
+		return buf
+	}
+}
+
+func iter_map_rmangler(kMangle, vMangle rMangler) rMangler {
+	return func(buf []byte, v reflect.Value) []byte {
+		r := v.MapRange()
+		for r.Next() {
+			buf = kMangle(buf, r.Key())
+			buf = append(buf, ':')
+			buf = vMangle(buf, r.Value())
+			buf = append(buf, '.')
+		}
+		if v.Len() > 0 {
+			buf = buf[:len(buf)-1]
+		}
+		return buf
+	}
+}
+
+// iface_value returns the raw value ptr for input boxed within interface{} type.
+func iface_value(a any) unsafe.Pointer {
+	type eface struct {
+		Type  unsafe.Pointer
+		Value unsafe.Pointer
+	}
+	return (*eface)(unsafe.Pointer(&a)).Value
+}