feat: HH-773 合集重命名接入 egress geo 缓存、geo 失败降级与每小时补探测

- service: EgressCacheKey 从 handler 下沉复用；MergeCachedEgressGeo 在合集
  重命名前合并缓存 geo 字段（纯缓存读、零网络 I/O）；StripEgressGeoFields
  防止 geo 字段泄漏进订阅输出
- filter: geo 检测失败的节点保留 '[别名] 原名'（或纯原名）参与编号/排序，
  不再丢弃
- handler: 每小时 StartEgressRefresher 对启用源补探测缺失/过期的 egress
  缓存（含 TTL 内 error 结果一律跳过）；RegisterRoutes 返回 *Deps；
  cmd/server.go 启动定时任务并在 shutdown 时取消
- tests: service 缓存 key 稳定性/合并/管道测试、handler 补探测跳过/TTL/
  过期/取消测试、filter 降级测试；修复 2 个过时测试（mihomo YAML 配置、
  缓存命中路径）

internal/filter/collection_rename.go

@@ -66,7 +66,8 @@ func geoFromNode(proxy model.ProxyNode) util.GeoInfo {
 // suffix) and numbered sequentially within each group, starting at 1.
 //
 // Nodes whose geographic info cannot be determined (no cached data and name
-// regex fails) are dropped from the output.
+// regex fails) are kept in the output under their original name (alias
+// prefixed), so they still participate in numbering and sorting.
 //
 // opts controls which fields are included in the output. A nil opts means all
 // fields are included (full default format).
@@ -99,7 +100,19 @@ func RenameCollectionNodes(proxies []model.ProxyNode, opts *model.RenameOptions)
 			geo = util.DetectGeo(ToString(proxy["name"]))
 		}
 		if geo.CountryName == "" {
-			// Geo detection failed — skip this node
+			// Geo detection failed — keep the node under its original name
+			// (alias-prefixed) so it still participates in numbering and sorting.
+			var parts []string
+			if o.Alias && alias != "" {
+				parts = append(parts, "["+alias+"]")
+			}
+			if name := ToString(proxy["name"]); name != "" {
+				parts = append(parts, name)
+			}
+			infos = append(infos, nodeInfo{
+				proxy:    proxy,
+				baseName: strings.Join(parts, " "),
+			})
 			continue
 		}
 

internal/filter/collection_rename_test.go

@@ -132,10 +132,21 @@ func TestRenameCollectionNodes_NoAlias(t *testing.T) {
 func TestRenameCollectionNodes_UnknownCountry(t *testing.T) {
 	proxies := []model.ProxyNode{
 		{"name": "Unknown Node", "type": "ss", "_sourceAlias": "A"},
+		{"name": "Bare Node", "type": "ss"},
 	}
 	result := RenameCollectionNodes(proxies, nil)
-	if len(result) != 0 {
-		t.Fatalf("expected 0 nodes (no cached geo info, should be filtered), got %d", len(result))
+	if len(result) != 2 {
+		t.Fatalf("expected 2 nodes (geo-unknown nodes must be kept), got %d", len(result))
+	}
+	// Unknown geo: keep the original name, alias-prefixed when present
+	if name, _ := result[0]["name"].(string); name != "[A] Unknown Node" {
+		t.Errorf("node[0] name = %q, want %q", name, "[A] Unknown Node")
+	}
+	if name, _ := result[1]["name"].(string); name != "Bare Node" {
+		t.Errorf("node[1] name = %q, want %q", name, "Bare Node")
+	}
+	if _, ok := result[0]["_sourceAlias"]; ok {
+		t.Error("_sourceAlias should be stripped from rename output")
 	}
 }