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.

pkg/mongo/interfaces.go

@@ -1,5 +1,9 @@
 package mongo
 
+import (
+	"go.mongodb.org/mongo-driver/bson/primitive"
+)
+
 // Logger defines the interface for logging operations
 type Logger interface {
 	Info(message string, fields map[string]interface{})
@@ -28,19 +32,19 @@ type IDSetter interface {
 
 // Model provides a common base for MongoDB documents
 type Model struct {
-	ID        string `bson:"_id,omitempty" json:"id,omitempty"`
-	CreatedAt int64  `bson:"created_at" json:"created_at"`
-	UpdatedAt int64  `bson:"updated_at" json:"updated_at"`
+	ID        primitive.ObjectID `bson:"_id,omitempty" json:"id,omitempty"`
+	CreatedAt int64              `bson:"created_at" json:"created_at"`
+	UpdatedAt int64              `bson:"updated_at" json:"updated_at"`
 }
 
 // GetID returns the document ID
 func (b *Model) GetID() string {
-	return b.ID
+	return b.ID.Hex()
 }
 
 // SetID sets the document ID
 func (b *Model) SetID(id string) {
-	b.ID = id
+	b.ID, _ = primitive.ObjectIDFromHex(id)
 }
 
 // SetCreatedAt sets the creation timestamp