How do I keep my integrity as a researcher under pressure?

You are holding onto your integrity while funding, publication, and your own hope all pull in the same tempting direction. The fact that it takes constant vigilance is not a sign you are weak. It is a sign you understand exactly how strong those pulls are. People who feel no pressure usually just aren't paying attention. Integrity was never meant to be effortless. It is a practice, like staying in shape, not a trophy you win once and keep. The vigilance you resent is the work itself. As long as you can still feel the pull and choose against it, you are winning the thing that matters. Build one guardrail that does not depend on your willpower in the moment: decide your methods and what counts as a result before you see the data. Then you only have to keep a promise you already made, when your judgment was clean.