Consider wider SQL aliases

[roji]

Our current SQL aliasing always just takes the first character of the identifier, so Order and OrderItems both get [o]; this causes uniquification to kick in, and we end up with o and o0 which are pretty hard to distinguish when looking at the SQL.

We could identify the pascal-cased .NET name and generate wider aliases, e.g. [o] and [oi]; this would improve our SQL readability/cleanliness.

Note that we'd probably want to support other naming schemes, e.g. snake_case.