PYSEC-2026-3509 PraisonAI GitHub template cache path traversal allows outside-cache file write and directory deletion

Summary PraisonAI's template loader accepts GitHub template URIs with refs, for example github:owner/repo/[email protected]. The resolver stores the user-controlled template path and ref verbatim, and the cache layer later joins those values into /.praison/cache/templates/github//// without...