Depends on how long it took you to build up to that volume. Either way, it’s obviously too much for you right now. Otherwise, you wouldn’t have tendonitis.
Most people can squat 3+ times weekly, I can do twice safely and three times is a gamble.
At least with pull-ups, once you’ve healed, you should vary your grip. Neutral/pronated/supinated. Get rings if you can. Do towel variants if not. Do not test it, often, let it heal.