* Validate and normalize auto-postpone period to days
- Add Entropy::AUTO_POSTPONE_PERIODS and validate auto_postpone_period against the allowed set
- Introduce auto_postpone_period_in_days for forms and entropy update endpoints
- Fall back to index 0 in knob partial when current value isn't in options
- Remove entropy_auto_close_options helper in favor of model constant
- Update tests to use allowed period values
* Use auto_postpone_period_in_days for JSON entropy updates
The JSON API was accepting auto_postpone_period (seconds) which
bypassed the days normalization and validation. Switch to
auto_postpone_period_in_days consistently and add explicit
wrap_parameters so flat JSON params are wrapped correctly for
the virtual attribute.
* Default to account or 30-day fallback when knob value is invalid
* Address PR review feedback for entropy validation
- Fall back to first knob option (index 0) when persisted value isn't in
the allowed set, preventing nil index errors for legacy values
- Use integer division (1.day.to_i) for consistent day calculations
* Default to account entropy period instead of first option for knob fallback
* Test that default auto-postpone period is in the allowed periods
* Return 422 instead of 500 for invalid entropy auto-postpone values
Rescue ActiveRecord::RecordInvalid in entropy controllers so invalid
auto_postpone_period_in_days values return 422 Unprocessable Entity
instead of raising a 500.
* Fix NoMethodError when board entropy falls back to account default
Use container.account.entropy.auto_postpone_period_in_days instead of
container.account.auto_postpone_period_in_days since Account doesn't
delegate that method.
* Test board entropy fallback to account default for invalid periods
Rob Zolkos