api/appdb: Create project and member in pg txn
api/appdb: Create project and member in pg txn

api/appdb: Create project and member in pg txn

I noticed this TODO, and I think the mentioned update to the pg package happened?

Closes chain/chainprv#531.
Reviewers: da39a3ee5e6b4b0d3255bfef95601890afd80709@tessr

chain/chain,chain/chain,chain/chain,chain/chain,chain/chain,chain/chain