Discard a project's reserved holdout window (escape hatch). Clears holdout_start, holdout_end and resets holdout_validation_count so the next lookback backtest allocates a fresh holdout window from its own date range.

Use this to recover when a backtest range falls entirely inside a stale reserved holdout (the run_backtest error points here).

Destructive — this throws away out-of-sample-integrity state (prior holdout validations no longer correspond to the reserved window), so it requires confirm=true. With confirm=false it is a no-op that just reports the current holdout window.

Args

• project_id — project whose holdout window to release.
• confirm — must be true to actually release.

release_holdout(project_id, confirm=true)