feat: AP-163 send raw instance status to Atmos Pro, extend to apply

[milldr]

What

• CLI sends raw command + exit_code to Atmos Pro instead of interpreting exit codes into status strings
• Extends status upload from plan-only to both plan and apply (both require explicit --upload-status flag)
• Reads --upload-status flag via Cobra/Viper (fixes silent no-op when flag was consumed by Cobra before reaching the upload code path)
• Treats plan exit code 2 (changes detected) as success after upload completes, so CI workflows don't fail

Why

Instances on the Atmos Pro dashboard show "Unknown" status after completed workflow runs. The CLI was only uploading status for plan (not apply), and was interpreting exit codes client-side. Moving interpretation server-side means status logic can be updated without a CLI release, and all exit codes (including errors) are now reported.

Ref

• AP-163
• PRD: docs/prd/instance-status-raw-upload.md
• Full PRD (Atmos Pro): cloudposse-corp/apps → apps/atmos-pro/prd/instance-status-from-workflow-hooks.md
• Atmos Pro counterpart: cloudposse-corp/apps qa-1 branch

Summary by CodeRabbit

Release Notes

• New Features

  • Added --upload-status flag to upload raw Terraform execution data (command and exit code) to Atmos Pro for both plan and apply operations.
  • Introduced configurable CI exit code mapping to remap Terraform exit codes while preserving original execution results in cloud uploads.

• Bug Fixes

  • Improved plan output detection to correctly identify cases where only output values change.

• Documentation

  • Added feature documentation and blog post explaining the new upload capability.

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues found.

Scanned Files

None

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.95%. Comparing base (990b763) to head (84719d1).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2216      +/-   ##
==========================================
+ Coverage   76.93%   76.95%   +0.01%     
==========================================
  Files        1003     1004       +1     
  Lines       95377    95390      +13     
==========================================
+ Hits        73380    73409      +29     
+ Misses      17743    17729      -14     
+ Partials     4254     4252       -2     

Flag	Coverage Δ
unittests	76.95% <100.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
cmd/terraform/options.go	100.00% <100.00%> (ø)
cmd/terraform/utils.go	48.58% <100.00%> (+0.18%)	⬆️
internal/exec/ci_exit_codes.go	100.00% <100.00%> (ø)
internal/exec/pro.go	47.36% <100.00%> (+0.80%)	⬆️
internal/exec/terraform.go	65.03% <100.00%> (+0.36%)	⬆️
pkg/pro/api_client_instance_status.go	65.51% <100.00%> (+4.22%)	⬆️
pkg/schema/schema.go	87.70% <ø> (ø)

... and 4 files with indirect coverage changes

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[github-actions]

These changes were released in v1.210.1-test.0.

[github-actions]

These changes were released in v1.210.1-test.1.

[github-actions]

These changes were released in v1.210.1-test.2.

[github-actions]

These changes were released in v1.211.0-test.9.

[github-actions]

These changes were released in v1.211.0-test.10.

[github-actions]

These changes were released in v1.211.0-test.11.

[github-actions]

These changes were released in v1.211.0-rc.1.

[github-actions]

These changes were released in v1.211.0-rc.2.