Miłosz Smółka

Add an example with projections/snapshots built over time in two variants: 1. Synchronous, within the same transaction. 2. Asynchronous, using watermill (see #25).

SQLStore initializes the schema on each instantiation now. Like in watermill-sql, let's introduce a setting for this in the `SQLConfig`. watermill-sql also checks if the passed `db` is not a...