[Fix] Address IoTConsensus retry path Sonar issues

[Caideyipi]

Description

This is a follow-up to #18323. Sonar reported three issues in the lock-protected SyncLog ordering and retry path.

This PR:

• documents and narrowly suppresses the cognitive/brain-method warnings on the stateful queue path;
• introduces a short local alias for the generated i18n message constant so the retry response no longer exceeds the line-length limit.

The request ordering and retry behavior are unchanged.

Verification

• ReplicateTest#syncLogWriteProcessErrorRetryPreservesRequestOrderTest: passed
• ReplicateTest#syncLogWriteProcessErrorTriggersLeaderRetryTest: passed
• Consensus compilation with the default and Chinese locales: passed
• Checkstyle: 0 violations
• Spotless and git diff --check: passed

---

This PR has:

• been self-reviewed.
• added a comment explaining the targeted Sonar suppression.
• been covered by the existing retry-order regression tests.