feat(redis): implement Pub/Sub support for usage tracking

- Added Redis Pub/Sub capability to broadcast usage updates to subscribed clients.
- Enhanced `redisqueue` with subscriber management and message broadcasting.
- Updated tests to validate Pub/Sub message handling, subscription behavior, and fallback to the queue after unsubscribing.
- Integrated `project_id` parsing into auth-files logic to include project identifiers in metadata.

internal/api/handlers/management/auth_files_project_id_test.go

@@ -0,0 +1,103 @@
+package management
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/router-for-me/CLIProxyAPI/v7/internal/config"
+	coreauth "github.com/router-for-me/CLIProxyAPI/v7/sdk/cliproxy/auth"
+)
+
+func TestListAuthFiles_IncludesProjectIDFromManager(t *testing.T) {
+	t.Setenv("MANAGEMENT_PASSWORD", "")
+	gin.SetMode(gin.TestMode)
+
+	authDir := t.TempDir()
+	fileName := "gemini-user@example.com-project-a.json"
+	filePath := filepath.Join(authDir, fileName)
+	if errWrite := os.WriteFile(filePath, []byte(`{"type":"gemini","email":"user@example.com","project_id":"project-a"}`), 0o600); errWrite != nil {
+		t.Fatalf("failed to write auth file: %v", errWrite)
+	}
+
+	manager := coreauth.NewManager(nil, nil, nil)
+	record := &coreauth.Auth{
+		ID:       fileName,
+		FileName: fileName,
+		Provider: "gemini-cli",
+		Status:   coreauth.StatusActive,
+		Attributes: map[string]string{
+			"path": filePath,
+		},
+		Metadata: map[string]any{
+			"type":       "gemini",
+			"email":      "user@example.com",
+			"project_id": "project-a",
+		},
+	}
+	if _, errRegister := manager.Register(context.Background(), record); errRegister != nil {
+		t.Fatalf("failed to register auth record: %v", errRegister)
+	}
+
+	h := NewHandlerWithoutConfigFilePath(&config.Config{AuthDir: authDir}, manager)
+	h.tokenStore = &memoryAuthStore{}
+
+	entry := firstAuthFileEntry(t, h)
+	if got := entry["project_id"]; got != "project-a" {
+		t.Fatalf("expected project_id %q, got %#v", "project-a", got)
+	}
+}
+
+func TestListAuthFilesFromDisk_IncludesProjectID(t *testing.T) {
+	t.Setenv("MANAGEMENT_PASSWORD", "")
+	gin.SetMode(gin.TestMode)
+
+	authDir := t.TempDir()
+	filePath := filepath.Join(authDir, "gemini-user@example.com-project-a.json")
+	if errWrite := os.WriteFile(filePath, []byte(`{"type":"gemini","email":"user@example.com","project_id":"project-a"}`), 0o600); errWrite != nil {
+		t.Fatalf("failed to write auth file: %v", errWrite)
+	}
+
+	h := NewHandlerWithoutConfigFilePath(&config.Config{AuthDir: authDir}, nil)
+
+	entry := firstAuthFileEntry(t, h)
+	if got := entry["project_id"]; got != "project-a" {
+		t.Fatalf("expected project_id %q, got %#v", "project-a", got)
+	}
+}
+
+func firstAuthFileEntry(t *testing.T, h *Handler) map[string]any {
+	t.Helper()
+
+	rec := httptest.NewRecorder()
+	ginCtx, _ := gin.CreateTestContext(rec)
+	ginCtx.Request = httptest.NewRequest(http.MethodGet, "/v0/management/auth-files", nil)
+
+	h.ListAuthFiles(ginCtx)
+
+	if rec.Code != http.StatusOK {
+		t.Fatalf("expected list status %d, got %d with body %s", http.StatusOK, rec.Code, rec.Body.String())
+	}
+
+	var payload map[string]any
+	if errUnmarshal := json.Unmarshal(rec.Body.Bytes(), &payload); errUnmarshal != nil {
+		t.Fatalf("failed to decode list payload: %v", errUnmarshal)
+	}
+	filesRaw, ok := payload["files"].([]any)
+	if !ok {
+		t.Fatalf("expected files array, payload: %#v", payload)
+	}
+	if len(filesRaw) != 1 {
+		t.Fatalf("expected 1 auth entry, got %d", len(filesRaw))
+	}
+	fileEntry, ok := filesRaw[0].(map[string]any)
+	if !ok {
+		t.Fatalf("expected file entry object, got %#v", filesRaw[0])
+	}
+	return fileEntry
+}