Record terraform run result metadata

[liyu-ma]

Context

We want to record terraform action success/failure or timeout error for stats purpose. Add logic to scan terraform logs to capture those info.

Change

• Add a new field result to terraform execution metadata record two flags "success": true/false and "timed_out": true/false }
• Improve the code so time elapsed can be captured even when the terraform action failed.
• Update terraform azapi timeout to 60 mins, and corresponding pipeline timeout to 2hr

See result field appended:

[Copilot]

Pull request overview

This PR adds a result field to each Terraform execution metadata record (mapped to a result dynamic-type column in the terraform_metadata_main table) and fixes a gap where elapsed time was not recorded when a Terraform action failed mid-run. The fallback mechanism scrapes Still creating/destroying... log lines to capture the last known elapsed time when no completion line is found.

Changes:

• Added COMPLETE_PATTERN (renamed from PATTERN), START_PATTERN, and ELAPSED_PATTERN regex constants to classify Terraform log lines.
• Extracted record-building into a build_result() helper that includes the new result: { success: bool } field.
• Modified process_terraform_logs to track in-progress state and emit a failure record (with success: false) when no completion line is found.