Genkit JS 0.5.6

What's Changed

• Fix issue where failed paths are written with parent path due to rethrows by @bryanatkinson in #576
• [Telemetry] Fix issue where non-leaf failure paths aren't being added. by @bryanatkinson in #580
• fix: fixed/updated go init template by @pavelgj in #582
• Remove superfluous debug log statements by @tonybaroneee in #581
• Fixes context middleware to append to user message only. by @mbleigh in #591
• Update GENKIT_VERSION global to latest. by @bryanatkinson in #584
• Add cloud scope for vertex authclient by @ssbushi in #600
• Cloud Run docs for Go by @kevinthecheung in #594
• Add genkit and its version as the user agent to all metrics exports by @kmandrika in #604
• RAG docs for Go by @kevinthecheung in #578

Full Changelog: 0.5.5...0.5.6