bug: Unbounded historicalSync.sync()

[kyscott18]

Description

historicalSync.sync() takes interval as a parameter and syncs all events in the given interval. If this interval is event dense, or very large, the function invocation can attempt to sync too many events, causing an OOM or other errors. Ideally, there would be an escape hatch when too many objects are held at once. This algorithm should optimize for correctness and not performance, as this rarely happens.

Related #1135