feat(service): implement PipelineErrorUpdated streaming event for pipeline errors

[donch1989]

Because

• Previously, pipeline trigger errors were not streamed to users; only component errors were streamed.

This commit

• Implements the PipelineErrorUpdated streaming event to handle pipeline errors.
• Improves trigger variable validation.

Note

• This is a quick solution to capture and stream most errors. Some errors may still be excluded, requiring further optimization.

[linear]

INS-6879 [Improvement] Stream the pipeline error to Console