format_eta_display: Format ETA information for display
Description
Helper function to format ETA information consistently across different methods.
Usage
format_eta_display(eta_seconds, estimated_completion_time)
Value
character string with formatted ETA or empty string if NA
Arguments
- eta_seconds
numeric ETA in seconds (can be NA)
- estimated_completion_time
POSIXct estimated completion time (can be NA)