chore: add defensive check to skip retry when node is starting

[jvsena42]

Related to #663

This PR adds a defensive check to the node start retry logic to prevent unnecessary retries when the node is already starting or running.

Description

Adds a guard in the .onFailure block of the start() function that checks if nodeLifecycleState.isRunningOrStarting() before triggering a retry. If the node is in a Starting or Running state when an error occurs, the function returns success instead of retrying, which could cause issues like NodeException.AlreadyRunning.

Preview

restart.webm

restore.webm

migration.webm

QA Notes

1. Run unit tests

   • ./gradlew testDevDebugUnitTest --tests LightningRepoTest
   • Verify start should not retry when node lifecycle state is Starting test passes

2. Verify the fix

   • The defensive check prevents retry loops when errors occur while the node is starting
   • This complements the existing fix that made sync non-fatal

[claude]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.