Remove/reduce minimum 10 character _key value constraint from all graph objects

[austinkelleher]

Currently, there is a constraint in the base GraphObject schema that all graph object _key values must be at minimum 10 characters. This has lead to some integration developers adding artificial prefixes at the beginning of _key values just to avoid it.

We should consider reducing the constraint to a single character or at least reducing the constraint lower than 10 characters.

cc @aiwilliams @ndowmon @mknoedel

[aiwilliams]

I agree, that constraint should be removed. We should be able to count on the the combination of _type and _key (scope, really) to prevent duplicates, as the key tracker does for us.

[mknoedel]

💯 👍 🥇