fix: format Telemetry errors (#299)

Description

Format Telemetry errors:

• remove error messages from the alert payload
• remove connection string from the DLE logs

Related issue

#299 (closed)

Examples

Checklist

• the MR description has been reviewed
• this MR contains text changes and they have been reviewed OR there are no texts changes
• this MR contains GUI/CLI changes and they have been reviewed OR there are no GUI/CLI changes
• this MR contains API changes, specifications reflect those changes and they have been reviewed OR there are no API changes

Closes #299 (closed)