Update company entity and repository for document file ID handling

- Modified the `DocumentFileIDs` field in the `Company` struct to ensure it is always persisted in BSON format, enhancing data consistency.
- Implemented logic in the `Update` method of the `companyRepository` to clear document file IDs when the slice is empty, ensuring accurate database updates.
- Added logging for errors encountered while clearing document file IDs, improving error tracking and debugging capabilities.

This update enhances the management of document file IDs within the company domain, ensuring proper handling and persistence in the database.

internal/company/entity.go

@@ -51,7 +51,7 @@ type Company struct {
 	Email *string `bson:"email,omitempty" json:"email,omitempty"`
 
 	// File references stored in GridFS
-	DocumentFileIDs []string `bson:"document_file_ids,omitempty" json:"document_file_ids,omitempty"`
+	DocumentFileIDs []string `bson:"document_file_ids" json:"document_file_ids,omitempty"`
 
 	// Tags for categorization and search
 	Tags *CompanyTags `bson:"tags,omitempty" json:"tags,omitempty"`

internal/company/repository.go

@@ -169,6 +169,8 @@ func (r *companyRepository) Update(ctx context.Context, company *Company) error
 	// Set updated timestamp using Unix timestamp
 	company.SetUpdatedAt(time.Now().Unix())
 
+	clearDocuments := company.DocumentFileIDs != nil && len(company.DocumentFileIDs) == 0
+
 	// Use ORM to update company
 	err := r.ormRepo.Update(ctx, company)
 	if err != nil {
@@ -179,6 +181,23 @@ func (r *companyRepository) Update(ctx context.Context, company *Company) error
 		return err
 	}
 
+	// BSON omitempty can skip empty slices in $set, so persist an explicit empty array.
+	if clearDocuments {
+		_, err = r.collection.UpdateOne(ctx, bson.M{"_id": company.ID}, bson.M{
+			"$set": bson.M{
+				"document_file_ids": []string{},
+				"updated_at":        company.UpdatedAt,
+			},
+		})
+		if err != nil {
+			r.logger.Error("Failed to clear company document file IDs", map[string]interface{}{
+				"error":      err.Error(),
+				"company_id": company.ID,
+			})
+			return err
+		}
+	}
+
 	r.logger.Info("Company updated successfully", map[string]interface{}{
 		"company_id": company.ID,
 		"name":       company.Name,