Implement Update Service Status

<UserStory> SER005: Update Service Status </UserStory>

<Changes>
    1. Integrated Controller with ServiceManagementService to support job completion workflow.
    2. Implemented ServiceManagementService::completeJob with validation for technician assignment, job existence, and status transition.
    3. Enhanced TechnicianMenu with job selection helper to display assigned jobs, allow index-based selection, and handle invalid choices.
    4. Updated TechnicianMenu::completeJob to mark job as completed via Controller and provide user feedback.
    5. Added logic to check if all jobs in a booking are completed, triggering invoice generation and customer notification.
</Changes>

<Test>

 Acceptance Criteria:
 1. Status updates are visible to customers immediately after technician marks job as completed.

 Precondition:
  1. Technician is logged into the system.
  2. At least one active job card is assigned to the technician.
  3. Datastore contains valid service bookings linked to jobs.

 Steps:
  1. Navigate to Technician menu and choose "Complete Job".
    - Verify that the system lists active jobs with index-based selection.
  2. Select a job card by index.
    - Verify that the job status changes from STARTED to COMPLETED.
  3. Check customer view.
    - Verify that the updated status is reflected in the customer’s booking history.
  4. If all jobs in the booking are completed:
    - Verify that an invoice is generated and a notification is sent to the customer.
</Test>

<Review>
Sreeja Reghukumar, please review
</Review>

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/models/JobCard.h

@@ -1,13 +1,12 @@
 #pragma once
 #include <string>
 #include "Timestamp.h"
+#include "Enums.h"
 
 class ServiceBooking;
 class Service;
 class User;
 
-enum class ServiceJobStatus : int;
-
 class JobCard
 {
 private:
@@ -20,7 +19,7 @@ private:
     std::string m_technicianId;
     User* m_technician;
     util::Timestamp m_assignedDate;
-    ServiceJobStatus m_status;
+    util::ServiceJobStatus m_status;
     util::Timestamp m_completionDate;
 
 public:
@@ -32,7 +31,7 @@ public:
         const std::string& technicianId, 
         User* technician, 
         const util::Timestamp& assignedDate, 
-        ServiceJobStatus status,
+        util::ServiceJobStatus status,
         const util::Timestamp& completionDate
     );
     const std::string& getId() const;
@@ -43,7 +42,7 @@ public:
     const std::string& getTechnicianId() const;
     User* getTechnician() const;
     const util::Timestamp& getAssignedDate() const;
-    ServiceJobStatus getStatus() const;
+    util::ServiceJobStatus getStatus() const;
     const util::Timestamp& getCompletionDate() const;
     void setId(const std::string& id);
     void setBookingId(const std::string& bookingId);
@@ -53,6 +52,6 @@ public:
     void setTechnicianId(const std::string& technicianId);
     void setTechnician(User* technician);
     void setAssignedDate(const util::Timestamp& assignedDate);
-    void setStatus(ServiceJobStatus status);
+    void setStatus(util::ServiceJobStatus status);
     void setCompletionDate(const util::Timestamp& completionDate);
 };