Turn system.replicated_partition_exports table into a history table by removing the TTL

[arthurpassos]

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• Backward Incompatible Change

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

Turn system.replicated_partition_exports table into a history table by removing the TTL. CLoses #1281

Documentation entry for user-facing changes

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Preserve ttl_seconds in exported manifests

During a rolling upgrade, a newly upgraded replica will now create /exports/.../metadata.json without ttl_seconds, but any still-running pre-change replica deserializes every export manifest with json->getValue<size_t>("ttl_seconds") in ExportReplicatedMergeTreePartitionManifest::fromJsonString. That makes those replicas throw an exception while polling/scheduling/displaying/killing the export, so mixed-version clusters can leave newly created exports unprocessed or invisible until every replica is upgraded. Please keep writing a dummy ttl_seconds field for the compatibility window while ignoring it in the new code.

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[github-actions]

Workflow [PR], commit [483a02e]

[mkmkme]

LGTM

[DimensionWieldr]

CI Failures Analysis

Related to this PR

• TTL expiry permits re-export of the same partition (glue/ice/no catalog): Expected — PR removes manifest TTL; second export correctly rejected with EXPORT_PARTITION_ALREADY_EXPORTED. Regression tests need updating (upstream integration tests already removed in this PR).

Test suite updates needed (not PR bugs)

• system tables partition sorting keys: Test expects empty partition_key on 26.3.12; PR 1874 behavior exposes name before first insert. Fix already exists in clickhouse-regression (check_if_antalya_post_26_3_10_20001) but CI ran older test.

Pre-existing / Infrastructure (Unrelated)

• 03924_phantom_parts_to_do_in_mutations — job killed by SIGTERM (timeout), no assertion captured; flaky history on upstream
• SQLLogic — 3 new OOM failures (Code 241), total count within threshold
• Grype Scan — CVE-2026-45447 in Ubuntu 22.04 base image, fixed by Antalya-26.3: Upgrade libssl3 in Ubuntu server Docker image #1925

Going to rerun failed tests.

Edit: Flaky 03924_phantom_parts_to_do_in_mutations and SQLLogic passed on rerun. LGTM