[PR] fix(alert): validate Prometheus duration unit order [rocketmq-dashboard]

["Loyal-Young (via GitHub)" <gi...@apache.org>]

Loyal-Young opened a new pull request, #6451:
URL: https://github.com/apache/rocketmq-dashboard/pull/6451

   ### Which Issue(s) This PR Fixes
   
   Fixes #6450
   
   ### Brief Description
   
   Require each unit in an alert duration at most once, in descending order, matching [Prometheus's duration parser](https://github.com/prometheus/common/blob/main/model/time.go). Previously `1s1m` and `1m1m` passed request validation and were exported verbatim into an unusable rule file.
   
   The exporter already shares this pattern, so legacy values with invalid unit order now use its existing `5m` fallback. Native reminder-interval parsing is unchanged. This change enforces unit order; it does not add numeric-range validation for Prometheus durations.
   
   ### How Did You Test This Change?
   
   - Java 21 Maven tests: `AlertRuleRequestDTOTest,AlertServiceTest,AlertRuleTransferDTOTest`: **103 passed**, no failures/errors/skips.
   - Regression run before the fix: six failures (five invalid-order request cases and the legacy export regression).
   - Controls include all supported units, mixed minute/millisecond suffixes, zero, valid compounds, empty text and fractional syntax.
   - Checkstyle: 0 violations; `git diff --check`: passed.
   
   No live Prometheus or full Maven suite was run. The snapshot contains no ArchitectureTest class; no ArchUnit execution is claimed.
   
   ### Checklist
   
   - [x] One coherent fix and regression tests
   - [x] No new files, dependencies or UI strings
   
   ### AI Assistance
   
   AI assistance was used to compare the input pattern with Prometheus's parser, draft the fix and regression cases, and execute the listed checks.
   


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Re: [PR] fix(alert): validate Prometheus duration unit order [rocketmq-dashboard]

["lizhimins (via GitHub)" <gi...@apache.org>]

lizhimins merged PR #6451:
URL: https://github.com/apache/rocketmq-dashboard/pull/6451


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