PraisonAI: Platform members can delete owner issue dependencies through member-owned related issues

PraisonAI is a multi-agent teams system. In `praisonai-platform` prior to version 0.1.9, issue dependency deletion can be authorized against the wrong side of a dependency edge. A workspace member cannot delete a dependency through the owner-created issue endpoint, but can delete the same dependency through a member-owned related issue endpoint because the route accepts either endpoint and checks delete permission only against the caller-selected URL issue. Version 0.1.9 patches the issue.