486b717801
- Changed `Signature` properties from `int` to `double` for precise positioning. - Added necessary using directives in `EnvelopeReceiverController.cs` for database operations. - Introduced a private `_cnnStr` field in `EnvelopeReceiverController` to store the connection string. - Updated the constructor to accept `IOptions<ConnectionString>` for dependency injection of the connection string. - Added a SQL command block to handle document element additions using a stored procedure. - Configured the `ConnectionString` class in `Program.cs` to bind the connection string from app settings. - Created a new `ConnectionString` class to manage the connection string value.