Publish token usage metrics

[cte]

Important

Add TaskTokenUsageUpdated event to track and handle token usage changes in tasks, updating schemas and tests accordingly.

• Behavior:
  • Add TaskTokenUsageUpdated event to track token usage changes in ExtensionChannel and Task.
  • Update ExtensionChannel to map RooCodeEventName.TaskTokenUsageUpdated to ExtensionBridgeEventName.TaskTokenUsageUpdated.
  • Emit TaskTokenUsageUpdated in Task when token usage changes, using hasTokenUsageChanged().
• Schemas:
  • Add tokenUsage to extensionTaskSchema in cloud.ts.
  • Add TaskTokenUsageUpdated to extensionBridgeEventSchema in cloud.ts.
• Tests:
  • Update ExtensionChannel.test.ts to include TaskTokenUsageUpdated in event listener tests.
• Misc:
  • Increment version in package.metadata.json from 1.73.0 to 1.74.0.
  • Add hasTokenUsageChanged() function in getApiMetrics.ts to compare token usage snapshots.

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[roomote]

Thank you for your contribution! I've reviewed the changes and found some issues that need attention. The most critical is the merge conflict that needs to be resolved before this can be merged.