Review/refresh troubleshooting notes #362
Description
This should probably be broken into sub-issues for the UI, CLI, and K8s sections but many of the troubleshooting notes in the guides haven't been touched since they were originally written. Most were written based on assumed potential problems, or might have better solutions today (like using the thv mcp commands to validate MCPs, new logging, etc.).
Worth reviewing these for applicability and accuracy. Also we should add common issues noted through user community interactions.