acp: Upgrade errors (#36980)

- **Pass --engine-strict to gemini install command**
- **Make it clearer that if upgrading fails, you need to fix i**

Closes #ISSUE

Release Notes:

- N/A
f4071bdd8eConrad Irwin committed on 8/27/2025, 6:24:56 AM· committed by GitHubparentabd6009
2 files changedLine totals unavailable