Surface OTLP export failures in observability step summary

[Copilot]

OTLP export failures were already persisted locally but not shown in the GitHub Actions Observability summary, creating a false “healthy” signal when backend export was broken. This change makes export health explicit in the run page summary, even when the conclusion span cannot be delivered.

• Observability summary now reports OTLP export health

  • generate_observability_summary.cjs now reads:
    • /tmp/gh-aw/otlp-export-errors.count
    • /tmp/gh-aw/otlp-export-errors.jsonl
  • Summary now includes:
    • otlp export errors count
    • warning line when failures exist
    • per-endpoint failure details (host, optional status, reason)

• Failure details are parsed defensively

  • Missing files, malformed lines, and invalid entries are ignored without failing summary generation.
  • Output remains stable and additive to existing Observability fields.

• Focused test coverage updated

  • generate_observability_summary.test.cjs now asserts:
    • OTLP error count rendering
    • warning visibility when count > 0
    • details list rendering from JSONL entries
    • zero-count behavior when files are absent

lines.push(`- **otlp export errors**: ${data.otlpExportErrors}`);
if (data.otlpExportErrors > 0) {
  lines.push("- ⚠️ OTLP export failures detected; telemetry may not be visible in the backend.");
}
if (data.otlpExportErrorDetails.length > 0) {
  lines.push("- **otlp export failure details**:");
}

[Copilot]

Pull request overview

This pull request makes OTLP export failures visible in the GitHub Actions “Observability” step summary by reading locally persisted export error count and JSONL failure details and rendering them in the run summary.

Changes:

• Add OTLP export error count + warning line to the observability step summary output.
• Parse and render per-endpoint OTLP export failure details from a JSONL file (defensively).
• Extend Vitest coverage to assert OTLP error count/detail rendering and absent-files behavior.

Show a summary per file

File	Description
actions/setup/js/generate_observability_summary.cjs	Reads OTLP export error count/details from /tmp/gh-aw and surfaces them in the Observability step summary.
actions/setup/js/generate_observability_summary.test.cjs	Adds assertions and fixtures to validate OTLP export error count/warning/details rendering, including zero-count when files are absent.

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• Files reviewed: 2/2 changed files
• Comments generated: 2