feat: add support for recent request tracking in auth records

- Implemented `RecentRequestsSnapshot` in `Auth` to capture bucketed recent request data.
- Added new fields and methods to `Auth` for tracking request success and failure counts over time.
- Updated `/v0/management/auth-files` response to include recent request data for each auth record.
- Introduced unit tests to validate request tracking and snapshot generation logic.

sdk/cliproxy/auth/conductor_recent_requests_test.go

@@ -0,0 +1,44 @@
+package auth
+
+import (
+	"context"
+	"testing"
+	"time"
+)
+
+func TestManagerMarkResultRecordsRecentRequests(t *testing.T) {
+	mgr := NewManager(nil, nil, nil)
+	auth := &Auth{
+		ID:       "auth-1",
+		Provider: "antigravity",
+		Attributes: map[string]string{
+			"runtime_only": "true",
+		},
+		Metadata: map[string]any{
+			"type": "antigravity",
+		},
+	}
+
+	if _, err := mgr.Register(WithSkipPersist(context.Background()), auth); err != nil {
+		t.Fatalf("Register returned error: %v", err)
+	}
+
+	mgr.MarkResult(context.Background(), Result{AuthID: "auth-1", Provider: "antigravity", Model: "gpt-5", Success: true})
+	mgr.MarkResult(context.Background(), Result{AuthID: "auth-1", Provider: "antigravity", Model: "gpt-5", Success: false})
+
+	gotAuth, ok := mgr.GetByID("auth-1")
+	if !ok || gotAuth == nil {
+		t.Fatalf("GetByID returned ok=%v auth=%v", ok, gotAuth)
+	}
+
+	snapshot := gotAuth.RecentRequestsSnapshot(time.Now())
+	var successTotal int64
+	var failedTotal int64
+	for _, bucket := range snapshot {
+		successTotal += bucket.Success
+		failedTotal += bucket.Failed
+	}
+	if successTotal != 1 || failedTotal != 1 {
+		t.Fatalf("totals = success=%d failed=%d, want 1/1", successTotal, failedTotal)
+	}
+}