I think you should confirm that that is the pitch they want. Have a thick hide and ask the production manager to check the rider to be sure. To my mind, it is far more likely to be a request for 415 that someone has read and conveyed wrong to you.
445 is quite rare outside of Austria (the Viennese oboe is built to 445). 415 is quite common for Baroque groups playing original instruments. Even if management checks and the rider does say 445, I'd still be skeptical and think it might be a typo. I'd find out the name of the group and make contact myself, to confirm. I think that even if they did want 445, they would appreciate your professionalism in doublechecking.
About raising pitch to 445, it shouldn't be an issue on instruments strung with modern wire (other than possibly the highest brass strings) - as Ed says, they go sharper than that seasonally in response to humidity. I've observed that for over 30 years with Hubbard and Zuckermann kit instruments with modern wire, with zero breakage. If it is strung with low tensile wire, I'd worry.
If it turns out they actually want 415, definitely lower pitch a week ahead, It is common for a brass string or two to break during that large a pitch lower. Do the pitch lowering slowly and steadily rather than a quick turn of the pin to help avoid this problem. A week should give time for it to stabilize well enough, and for any string that had to be replaced to come to a reasonably stable condition.
Regards,
Fred Sturm
"Travel is fatal to prejudice, bigotry, and narrow-mindedness." Twain