Epic: 2.3.0 #67

Goal

2.3.0 ships the additive items of the roadmap's 2.3.0 section: an optional Cause on Fault<TFault>, the opt-in that withholds the fault name, a default value-object key over ulong, async assertions in Testing, and CatchAsync over a ValueTask with TraverseAsync on Option and Patch.

In scope and out of scope

In: additions, and fixes found along the way. Out: anything breaking, which waits for 3.0.0, and the dropped WS3 to WS6 work.

Done when

Every sub-issue is closed, the suite passes, which holds the oracle catalogue, oracles seeds shows every seed caught (decision 112, which retired the prober's gate), v2.3.0 is tagged on the merge of release/2.3.0 into main, and the packages are on nuget.org. The release PR into main closes this epic.