I accidentally left my Camry on [engine off] overnight and in the morning found that the battery was completely drained. I jumped the car and now the battery seems to be working fine.

Since the battery was completely drained, I'm worried that this battery won't be reliable anymore. Is a jumped battery as reliable as it was before it was drained? Will I need to replace this battery soon? Or can I expect it to follow its normal lifecycle?

 

dont replace the battery, you will just need to recharge it.
when you are using the battery its internal structure is changing and this makes it non cunductable but a recharge will revert it back to its normal state. you can expect a full lifetime for your battery.