The short answer to your question is to disappear from recruiting/volleyball until she is completely and without a doubt healed (pain free/mentally free).
From a recruiting perspective, better to just say she has a stress fracture (no need to elaborate further) and the family has decided to focus on rehabilitation versus playing. Then, completely focus on resting and healing. Don't travel to tournaments and sit on the bench because coaches will look at think "what is wrong with her"? I would not even continue with club volleyball practice or going to gym for club; get healthy and many times stress fractures just need complete non athletic activity.
Out of sight and out of mind is the way to go. Plus, and this is a big plus; let her enjoy being a high school kid - maybe she can do something she has not been able to do because of club volleyball? Like join the theator club, go on science field trips, mentor junior high kids after school? Take this as a unique opportunity to do something else for a spell.
She will be in an excellent position next year as a senior - This is because the recruiting process never ends for collegiate programs and there is so much turnover in rosters (because of players getting cut, quitting and coaches getting fired or quitting) that there are always a ton of senior opportunities.
Let me say, that 5'9" is not too short for lower DI or any level of DII - If she has good skill sets and is athletic, she can easily play those positions. Better for her to promote herself as a ball control Outside, than one of 10,000 Liberos/DS's. I can't emphasize that enough; next year, lower DI's and all DII (and NAIA's) will be searching long and hard for OH's that can pass and attack and are willing to give up inches for ball control and talent.
Just make sure that late November, start reaching out to any and every school which fits your daughter's (and family) comfort zone - Do a massive reach out because the worst thing that happens is the college coach hits the delete button. But, again, I know from experience, colleges will be ramping up their recruiting efforts late November because their collegiate season is done, and they know who they will be cutting or who did not recover from an injury, etc.
Hang in there - Better VB days ahead, but possibly great non-VB days immediately!