[X][THEMIS] Open the Straits of Themis to limited commerce. Set up an Access Zone, patrolled by Starfleet. (This will act as another border zone, and will have a garrison requirement). In exchange, Cardassia must accept economic concessions (+50 BR/SR a year, limited trade open). Hawks angry, Expansionists annoyed (-26 pp). Cardassia will be unhappy, but may accept this arrangement.
you know what this does? it creates an ongoing point of concern between us, Cardassia , and the dawair. A permanent sore point to remind the space dwarves that they singed away the ability to so much as negotiate their own trade agreements. An example of the loss of sovereignty that comes with being in the pact. It's also forcing the cardassians to negotiate from a position of weakness, which will cost them a bucket of PP or whatever they have instead.
that said, Starfleet should be the ones patrolling the new zone because it's dealing with an external power, it is literally our job to do that sort of thing.