refactor: Remove Token management and integrate Redis for authentication

- Deleted the Token model and its repository, transitioning to a Redis-based token management system.
- Updated the service layer to utilize Redis for token storage, enhancing performance and scalability.
- Refactored the container to remove TokenRepository and integrate the new token service.
- Cleaned up the Dockerfile and other files by removing unnecessary whitespace and comments.
- Enhanced error handling and logging for Redis initialization and usage.

internal/testutil/testutil_test.go

@@ -0,0 +1,27 @@
+package testutil
+
+import "testing"
+
+func TestNewTestDB(t *testing.T) {
+	db := NewTestDB(t)
+	sqlDB, err := db.DB()
+	if err != nil {
+		t.Fatalf("DB() err: %v", err)
+	}
+	if err := sqlDB.Ping(); err != nil {
+		t.Fatalf("ping err: %v", err)
+	}
+}
+
+func TestNewTestCache(t *testing.T) {
+	cache := NewTestCache()
+	if cache.Policy.UserTTL == 0 {
+		t.Fatalf("expected defaults filled")
+	}
+	// disabled cache should not error on Set
+	if err := cache.Set(nil, "k", "v"); err != nil {
+		t.Fatalf("Set on disabled cache should be nil err, got %v", err)
+	}
+}
+
+