Patch in a new clj-stacktrace that shows ex-data

[arrdem]

At present we're depending on an EXTREMELY old version of clj-stacktrace which totally does most of what we want - but it doesn't render ex-data when showing causes and stack frames. Which is a serious limitation since Katamari's entire exception / tracing story is driven by trying to recursively capture context and inputs in chained ex-info instances.

[arrdem]

There may be clj-stacktrace forks I can use "off the shelf" which do this, or I may need to vendor one in.