fix(eclwatch): display error message in WUResult table

[jeclrsg]

catch exception thrown in wuResult.fetchRows() and pass that message back to the dgrid table to display instead of the normal noDataMessage

HPCC-32576 (Viewing a file does not pass back errors to the user)

Checklist:

• The commit message is properly formatted and free of typos.
  • The commit message title makes sense in a changelog, by itself.
  • The commit message includes a "fixes" reference if appropriate.
  • The commit is signed.
• The change has been fully tested:
  • I have viewed all related gallery items
  • I have viewed all related dermatology items
• There are no similar instances of the same problem that should be addressed
  • I have addressed them here
  • I have raised new issues to address them separately

Testing:

[Copilot]

Pull Request Overview

This PR enhances error handling in the WUResult table by catching exceptions from wuResult.fetchRows() and conveying the error message back to the UI.

• Updates the Store class to accept an onError callback and capture the last error.
• Modifies WUResult to pass a callback that updates the dgrid noDataMessage with the exception message.
• Adds a published property for exceptionMessage in the dgrid Common class.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
packages/eclwatch/src/WUResultStore.ts	Adds error handling in the Store with an onError callback and _lastError tracking.
packages/eclwatch/src/WUResult.ts	Passes an error callback to Store to update exceptionMessage and refresh dgrid messaging.
packages/dgrid/src/Common.ts	Publishes the exceptionMessage property to support UI error updates.

Comments suppressed due to low confidence (1)

packages/eclwatch/src/WUResultStore.ts:189

• Verify that the Exception object always provides a 'Message' property (with uppercase M). If the standard property name is 'message' (lowercase), the error message may be incorrectly captured.

this._lastError = err.Message || "An exception has occurred";