Realistically, there's no way to know for sure if the fork is safe, certainly not at the remove via the Internet.
You have to look for signs and make your own assessment.
OTOH- the integrity of the fork may not mean anything. What matters is what you think it's integrity is. At some time, you'll be riding down some hill at 35mph or more, maybe of rough pavement, and do you want to be worrying about the fork
Either convince yourself that it's 100% OK or replace it so you can have peace of mind.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.