I think those few lines could be enough. One of the problems with the prequels is their lack of faith that the viewer can figure things out for themselves. You, the viewer, know that the republic has approved the army, because of the crawl telling you, so isn't it common knowledge that the republic would also want to keep an eye on its progress. Also, to pull off the idea that the force set up the meeting with Jango and Obi-Wan I don't think it is a good idea for us to to see Jango up close until Ob-Wan sees his armor in Jango's apartment. This would mean cutting out Zam's meeting with Jango at the beginning, which are completely unneccessary in my oppinion. By not seeing Zam sending the droid to Padme's apartments it would create suspense, because you don't know who is trying to kill padme. Then you find out it is Zam and then she is killed right when you feel that the Jedi have stopped the danger. Hoped the last part about Zam makes sense.