feat(user): add user invitation functionality and enhance OTP verification

- Introduced UserInvitation entity and updated IApplicationDbContext to include UserInvitations DbSet.
- Enhanced VerifyOtpTokenCommand and its handler to support optional inviter mobile number for user registration.
- Added new Protobuf definitions for GetMyInvitees and GetInvitationsByFilter RPCs to manage user invitations.
- Updated UserService to implement methods for retrieving invitees and invitations based on filters.
- Bumped Protobuf project version to reflect the addition of new features.

src/CMSMicroservice.Protobuf/Protos/user.proto

@@ -115,6 +115,16 @@ service UserContract
             
         };
     };
+    rpc GetMyInvitees(GetMyInviteesRequest) returns (GetMyInviteesResponse){
+        option (google.api.http) = {
+            get: "/Customer/GetMyInvitees"
+        };
+    };
+    rpc GetInvitationsByFilter(GetInvitationsByFilterRequest) returns (GetInvitationsByFilterResponse){
+        option (google.api.http) = {
+            get: "/GetInvitationsByFilter"
+        };
+    };
     rpc UploadCustomerAvatar(UploadCustomerAvatarRequest) returns (UploadCustomerAvatarResponse){
         option (google.api.http) = {
             post: "/Customer/UploadAvatar"
@@ -294,6 +304,8 @@ message VerifyOtpTokenRequest
     string purpose = 2;
     string code = 3;
     google.protobuf.StringValue parent_referral_code = 4;
+    // شماره موبایل دعوت‌کننده (اختیاری؛ فقط برای ثبت‌نام جدید)
+    google.protobuf.StringValue inviter_mobile = 5;
 }
 message VerifyOtpTokenResponse
 {
@@ -466,3 +478,78 @@ message UpdateCustomerSettingsRequest
     google.protobuf.StringValue time_zone = 6;
     google.protobuf.BoolValue two_factor_auth_enabled = 7;
 }
+
+// ============= Inviter (دعوت‌کننده) — جدا از معرف شبکه =============
+
+message GetMyInviteesRequest
+{
+    city.PaginationState pagination_state = 1;
+    // ALL | ACTIVE | INACTIVE — بر اساس ClubMembership.IsActive
+    google.protobuf.StringValue club_status_filter = 2;
+}
+
+message GetMyInviteesResponse
+{
+    city.MetaData meta_data = 1;
+    repeated InviteeModel invitees = 2;
+    InviteeStats stats = 3;
+}
+
+message InviteeModel
+{
+    int64 user_id = 1;
+    google.protobuf.StringValue first_name = 2;
+    google.protobuf.StringValue last_name = 3;
+    string mobile = 4;
+    google.protobuf.Timestamp registered_at = 5;
+    bool is_club_active = 6;
+}
+
+message InviteeStats
+{
+    int32 total_invitees = 1;
+    int32 club_active_count = 2;
+    int32 club_inactive_count = 3;
+}
+
+message GetInvitationsByFilterRequest
+{
+    city.PaginationState pagination_state = 1;
+    google.protobuf.StringValue sort_by = 2;
+    GetInvitationsByFilterFilter filter = 3;
+}
+
+message GetInvitationsByFilterFilter
+{
+    google.protobuf.StringValue inviter_mobile = 1;
+    google.protobuf.StringValue inviter_first_name = 2;
+    google.protobuf.StringValue inviter_last_name = 3;
+    google.protobuf.StringValue invitee_mobile = 4;
+    google.protobuf.StringValue invitee_first_name = 5;
+    google.protobuf.StringValue invitee_last_name = 6;
+    google.protobuf.BoolValue invitee_club_active = 7;
+    google.protobuf.Timestamp created_from = 8;
+    google.protobuf.Timestamp created_to = 9;
+}
+
+message GetInvitationsByFilterResponse
+{
+    city.MetaData meta_data = 1;
+    repeated InvitationReportModel models = 2;
+}
+
+message InvitationReportModel
+{
+    int64 id = 1;
+    int64 inviter_user_id = 2;
+    google.protobuf.StringValue inviter_first_name = 3;
+    google.protobuf.StringValue inviter_last_name = 4;
+    string inviter_mobile = 5;
+    int64 invitee_user_id = 6;
+    google.protobuf.StringValue invitee_first_name = 7;
+    google.protobuf.StringValue invitee_last_name = 8;
+    string invitee_mobile = 9;
+    google.protobuf.Timestamp invitee_registered_at = 10;
+    bool invitee_club_active = 11;
+    google.protobuf.Timestamp invited_at = 12;
+}