branch-4.1: [enhance](cloud) proactively sync tablet meta after alter #61585 - #66798
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FE now sends a sync_tablet_meta RPC to all alive cloud backends after alter updates tablet meta in meta service. The request carries affected tablet ids and is dispatched as a best-effort notification, so alter success still depends on meta service update instead of backend acknowledgements. BE handles the RPC by refreshing meta only for tablets that are already cached locally. Uncached tablets are skipped, which avoids polluting tablet cache while still fixing stale compaction policy and related tablet meta on active compute clusters. The RPC also returns synced/skipped/failed counts and exposes bvar counters for observability. This change adds FE and BE unit tests and a cloud regression suite. The regression covers cached and uncached multi-cluster behavior, the negative path with proactive notify disabled, and the version-limit scenario where a size_based table hits too many versions, is altered to time_series, and can accept new writes immediately after alter.
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Thank you for your contribution to Apache Doris. Please clearly describe your PR:
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run buildall |
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Cloud UT Coverage ReportIncrement line coverage Increment coverage report
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BE UT Coverage ReportIncrement line coverage Increment coverage report
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Cherry-picked from #61585