Dynoxide 0.11.2: a stack of conformance fixes

Dynoxide 0.11.2 is a conformance patch - a stack of fixes for spots where the engine did something real DynamoDB doesn't. Most of it is drift the conformance suite turned up faster than I'd been closing it. The lead one I can tie to something concrete: last week I worked out what a conditional DynamoDB transaction costs and pinned the numbers against real AWS. This release makes dynoxide report…