Enhance API documentation and restructure routes for improved clarity

- Updated README.md to include comprehensive Swagger documentation details, highlighting new features and endpoint categories.
- Introduced a new router structure to streamline route registration for admin and public endpoints, enhancing maintainability.
- Updated health check endpoint documentation to reflect comprehensive server status information.
- Enhanced customer and company management routes with improved descriptions and examples in Swagger.
- Refactored customer and user handlers to remove obsolete route registrations, aligning with the new router structure.
- Improved response handling in customer and user services to utilize string IDs consistently.
- Updated validation rules and forms for customer management to support multiple company assignments.
- Enhanced logging practices across services to ensure better traceability and error handling.

internal/user/entity.go

@@ -2,6 +2,8 @@ package user
 
 import (
 	"tm/pkg/mongo"
+
+	"go.mongodb.org/mongo-driver/bson/primitive"
 )
 
 // UserRole represents user roles in the system
@@ -25,7 +27,7 @@ const (
 
 // User represents a system user (admin/manager/operator)
 type User struct {
-	mongo.Model
+	mongo.Model  `bson:",inline"`
 	FullName     string     `bson:"full_name" json:"full_name"`
 	Username     string     `bson:"username" json:"username"`
 	Email        string     `bson:"email" json:"email"`
@@ -45,12 +47,12 @@ type User struct {
 
 // SetID sets the user ID (implements IDSetter interface)
 func (u *User) SetID(id string) {
-	u.ID = id
+	u.ID, _ = primitive.ObjectIDFromHex(id)
 }
 
 // GetID returns the user ID (implements IDGetter interface)
 func (u *User) GetID() string {
-	return u.ID
+	return u.ID.Hex()
 }
 
 // SetCreatedAt sets the created timestamp (implements Timestampable interface)