Fix starter lab SRE response plan creationModify response plan creation parameters in post-provision.sh

[DOliana]

Summary

Fixes response plan creation in the starter lab post-provision script.

Problem

The script repeatedly received HTTP 400 when creating the grubify-http-errors response plan. Azure Monitor was connected and alerts fired successfully, but no response plan existed, so alerts were not routed to the SRE agent.

Changes

• Replace obsolete maxAttempts with maxAutomatedInvestigationAttempts
• Add the response plan fields required by the current API
• Scope the plan to alert-http-5xx-sre-lab
• Print the API response body when creation fails
• Quote temporary file paths

Evidence

Before:

• Response plan PUT returned HTTP 400
• SRE Agent response-plan API returned []
• Azure Monitor alerts fired but were not routed to the agent

After:

• Response plan PUT returned HTTP 200
• bash scripts/post-provision.sh --retry completed successfully
• The grubify-http-errors plan was created and routed to incident-handler