Release v19.83.2

Fixed

• Projection futures (child events stored until their parent exists) now resolve when the parent is matched on a composite or object key. Key comparison threw InvalidCastException: Object must implement IConvertible for such keys, so the future never resolved, the child event stayed missing from the read model, and the same warning was logged on every pass. A future that keeps failing now logs one warning and then logs at debug level. (#5045)