Start the Go rewrite: jsjson, awg-ctrl port, differential bench

- internal/jsjson: JSON.stringify-compatible encoder and order-preserving decoder,
  tested against fixtures produced by Node itself
- internal/ctrl: awg-ctrl in Go (params, vpn:// keys, users, peers, sync, 3.1
  upgrade, CAKE shaping, metrics, monitor job, Express-compatible HTTP layer)
- internal/iauth, internal/logx: internal Ed25519 tokens and logging
- tools/diffbench: Docker bench with stubbed awg/ip/tc/nft that runs one scenario
  against the TS and Go implementations for comparison

internal/ctrl/helpers.go

@@ -0,0 +1,118 @@
+package ctrl
+
+import (
+	"math"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"github.com/maeneko/forgetting/internal/jsjson"
+)
+
+var reOwner = regexp.MustCompile(`^[\w/.-]{0,64}$`)
+
+// checkPubKeyAny — checkPubKey для значения из JSON (не строка → тот же 400).
+func checkPubKeyAny(v any) (string, error) {
+	k, ok := v.(string)
+	if !ok {
+		return "", httpErr(400, "Неверный публичный ключ")
+	}
+	return checkPubKey(k)
+}
+
+func checkPubKeys(arr []any) ([]string, error) {
+	out := make([]string, 0, len(arr))
+	for _, v := range arr {
+		k, err := checkPubKeyAny(v)
+		if err != nil {
+			return nil, err
+		}
+		out = append(out, k)
+	}
+	return out, nil
+}
+
+// jsToNumber — Number(v) для значений из JSON.
+func jsToNumber(v any) float64 {
+	switch x := v.(type) {
+	case nil:
+		return 0
+	case float64:
+		return x
+	case bool:
+		if x {
+			return 1
+		}
+		return 0
+	case string:
+		return jsNumber(x)
+	}
+	return math.NaN()
+}
+
+func (s *Server) knownPubKeys() (map[string]bool, error) {
+	known := map[string]bool{}
+	rows, err := s.db.Query("SELECT pub_key FROM users")
+	if err != nil {
+		return nil, err
+	}
+	for rows.Next() {
+		var k string
+		rows.Scan(&k)
+		known[k] = true
+	}
+	rows.Close()
+	peers, err := s.peersAll()
+	if err != nil {
+		return nil, err
+	}
+	for _, p := range peers {
+		known[p.PubKey] = true
+	}
+	return known, nil
+}
+
+func (s *Server) isKnownPub(k string) (bool, error) {
+	if p, err := s.peerGet(k); err != nil || p != nil {
+		return p != nil, err
+	}
+	var n int
+	if err := s.db.QueryRow("SELECT COUNT(*) FROM users WHERE pub_key = ?", k).Scan(&n); err != nil {
+		return false, err
+	}
+	return n > 0, nil
+}
+
+// profileAwg — параметры для /api/profile в порядке CONFIG.awgParams (порядок объявления в
+// DEFAULT_AWG_PARAMS), без пустых значений; числа — строками.
+func profileAwg(p Params) jsjson.Object {
+	o := jsjson.Object{}
+	add := func(k, v string) {
+		if v != "" {
+			o = append(o, jsjson.KV{Key: k, Val: v})
+		}
+	}
+	itoa := strconv.Itoa
+	add("Jc", itoa(p.Jc))
+	add("Jmin", itoa(p.Jmin))
+	add("Jmax", itoa(p.Jmax))
+	add("S1", itoa(p.S1))
+	add("S2", itoa(p.S2))
+	add("S3", itoa(p.S3))
+	add("S4", itoa(p.S4))
+	add("H1", p.H1)
+	add("H2", p.H2)
+	add("H3", p.H3)
+	add("H4", p.H4)
+	add("I1", p.I1)
+	add("I2", p.I2)
+	add("I3", p.I3)
+	add("I4", p.I4)
+	add("I5", p.I5)
+	for _, k := range AWG3Keys {
+		add(k, p.A3[k])
+	}
+	return o
+}
+
+var _ = strings.TrimSpace