Module re-export in pagila example

[sl1depengwyn]

According to this question this code https://github.com/haskell-beam/beam/blob/4ed616fdd9f0431a8ce634733bd6d43fed05b173/beam-postgres/examples/Pagila/Schema/V0002.hs#L7-L13 re-exports nothing from V0001 module, thus we have no access to datatypes that are declared in V0001 wherever we import Pagila.Schema module