[ISSUE #2463] fix(auth): make status updates idempotent

[yuluo-yx]

Summary

• return early when a requested enabled state already matches storage
• avoid last-admin validation for disabled-admin no-op updates
• skip database writes and session revocation for no-op requests

Verification

• AuthServiceDatabaseTest: 9 tests passed
• Checkstyle passed with 0 violations
• scope check: 16 changed lines

Fixes #2463

[RockteMQ-AI]

Summary

Makes user status updates idempotent by returning early when the user is already in the desired state, avoiding unnecessary database writes and session invalidations.

Strengths:

• Prevents redundant database operations
• Avoids unnecessary session invalidation when status is unchanged
• Test verifies the idempotent behavior with proper mock verification
• Maintains existing safety checks (last admin protection)

LGTM — improves API efficiency and predictability.

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Automated review by github-manager-bot

[RockteMQ-AI]

⚠️ Merge conflict detected

This PR has conflicts with the base branch and cannot be merged. Please rebase or merge the base branch into your branch and resolve the conflicts:

git fetch origin
git checkout 0820-yuluo-yx/fix-13
git rebase origin/rocketmq-studio
# resolve conflicts, then:
git push --force-with-lease

This is a one-time reminder. Feel free to @mention me for a re-review after conflicts are resolved.

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