Configurable Best-Before Validation Date Basis for Batch Reservations (Ship Date vs Requested Receipt Date)

Issue Description:

Today there’s an inconsistency in how “best-before date” is evaluated for batch-controlled items:

• MRP/ATP validate shelf life based on the sales order ship date.
• Warehouse reservation (Release to warehouse or manual “Batch reservation”) validates against the requested receipt date.

This mismatch leads to practical issues: ATP can show availability, but when attempting to reserve, the Batch reservation dialog returns no selectable batches (blank grid) because the receipt date check is stricter than the ship date logic used by ATP/MRP. This creates confusion for users and blocks standard flows (especially FEFO/shelf-life scenarios with transport days or sellable days).

Proposed Idea:

Add a configurable parameter to control which date the reservation engine uses for best-before validation, so customers can align Warehouse reservation with their ATP/MRP logic.