Release v4.49.5

Fixed

• Native Stage command forms now keep dirty input values across equivalent scene reloads and layout-only rebinds by stabilizing the Arc command descriptor identity. (part of #236) (part of #237)
• Native Stage command forms now honor explicit empty JSON Schema required lists as optional input and visibly block unsupported object, array, and fractional field-width metadata instead of silently coercing it. (part of #236) (part of #237)