feat: Latency budget available as an argument, bug fix where network redirection is counted as cost (#27)

* Support latency budget

* Vibe coded renaming of dirs for optimizations

* Changing network destinations is overhead-free

* Reduce destructuring of DecoupleILPMetadata

* Function visibility for tests

* Move DecoupleILPMetadata functions out of impl since that causes problems with stageleft

Author: davidchuyaya