fix: status field miss causing drift suppression

[KartikJha]

🔧 Changes

Fixes a silent no-drift bug where an auth0_action that failed to build would
appear healthy on subsequent terraform plan runs, making Terraform-driven
recovery impossible.

Root cause: status was not tracked in the auth0_action schema.
readAction() discarded it, so Terraform saw no diff after a failed build — plan
always reported "No changes."

Fix:

• Added status as a Computed attribute on auth0_action (resource.go).
• flattenAction() now stores the value returned by the API (flatten.go).
• A CustomizeDiff hook forces replacement when status == "failed" and deploy == true:
  • d.SetNewComputed("status") creates the required diff entry (bare
    d.ForceNew errors without it on a Computed-only attribute).
  • d.ForceNew("status") marks the resource for replacement.
  • The deploy == true gate prevents non-deployed draft actions from looping in
    endless replace cycles.

After the fix, the next terraform plan against a failed action shows:

~ resource "auth0_action" "example" {
~ status = "failed" -> (known after apply) # forces replacement
}

and the next terraform apply re-triggers the build automatically.

No state migration needed. On first plan after provider upgrade, healthy
actions show + status = "built" (cosmetic); failed actions immediately show the
replacement plan.

🔬 Testing

Reproduced and verified against live tenant kartik-esd-57610.sus.auth0.com using
a 3-stage repro script (esd_65986_status_no_drift_repro/):

1. terraform apply -var dep_mode=good → both actions reach status="built"
2. terraform apply -var dep_mode=bad → UPDATE path, build fails, no SDKv2 taint,
   status="failed" on backend
3. terraform plan -var dep_mode=bad:
   • Without fix: exits 0, "No changes" — bug confirmed
   • With fix: exits 2, shows status = "failed" -> (known after apply) # forces replacement — fix confirmed

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)