Fix MCP gateway health check curl exit handling

[Copilot]

The Smoke Codex workflow fails with exit code 7 when the MCP gateway health check curl command cannot connect. With set -e enabled, the script exits immediately before reaching error diagnostics.

Changes

Modified actions/setup/sh/start_mcp_gateway.sh:

• Temporarily disable set -e around curl call to capture exit code
• Log curl exit code for debugging
• Re-enable set -e after capture

# Before: Script exits immediately on curl failure
RESPONSE=$(curl -s --retry 120 ... "http://localhost:8080/health" 2>&1)

# After: Capture exit code, proceed to diagnostics
set +e
RESPONSE=$(curl -s --retry 120 ... "http://localhost:8080/health" 2>&1)
CURL_EXIT_CODE=$?
set -e

This allows the script to reach health validation logic that logs gateway status, process info, and network connectivity instead of silently failing with exit code 7.

Original prompt

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This section details on the original issue you should resolve

<issue_title>[aw] Smoke Codex failed</issue_title>
<issue_description>## Problem

The agentic workflow Smoke Codex has failed. This typically indicates a configuration or runtime error that requires user intervention.

Failed Run

• Workflow: Smoke Codex
• Failed Run: https://github.com/githubnext/gh-aw/actions/runs/20897369313
• Source:

How to investigate

Use the debug-agentic-workflow agent to investigate this failure.

In GitHub Copilot Chat, type /agent and select debug-agentic-workflow.

When prompted, provide the workflow run URL: https://github.com/githubnext/gh-aw/actions/runs/20897369313

The debug agent will help you:

• Analyze the failure logs
• Identify the root cause
• Suggest fixes for configuration or runtime errors

Generated from Smoke Codex

Comments on the Issue (you are @copilot in this section)

• Fixes [aw] Smoke Codex failed #9638

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