File Uploads

File upload endpoints use multipart/form-data with form field name file.

Return labels:

• POST /site-visits/{id}/return-label
• GET /site-visits/{id}/return-label
• supported type: PDF

Message attachments:

• POST /messages/{id}/file-attachment
• GET /messages/{id}/file-attachment
• supported types: PDF, PNG, JPEG

Each upload creates a new version entry.