fix(security): reject encrypted-envelope credentials at provider create/update validation - #15932

Queue entry conditions

• all of [🚦 Auto-merge conditions]:
  • label = queue
• any of [🔀 queue conditions]:
  • all of [📌 queue conditions of queue rule release]:
    • label=queue
    • -conflict
    • -draft
    • base~=^release/v\d+\.\d+\.\d+$
    • github-review-approved [🛡 GitHub repository ruleset rule Require PR on default branch]
• -closed [📌 queue requirement]
• -conflict [📌 queue requirement]
• -draft [📌 queue requirement]
• any of [📌 queue -> configuration change requirements]:
  • -mergify-configuration-changed
  • check-success = @mergify/Configuration changed
  • check-success = @mergify/Configuration has been deleted
• any of [📌 queue requirement]:
  • check-neutral = @mergify/Mergify Merge Protections
  • check-skipped = @mergify/Mergify Merge Protections
  • check-success = @mergify/Mergify Merge Protections

All conditions must match for automatic queuing. You can also use @Mergifyio queue to queue manually.