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feat(ha-heartbeat-committed-propagation): add reconcile-free ha_observe_heartbeat_committed (task 2.1)

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Strict-monotonic updater for a standby's learned committed position: advance
last_known_committed_lsn only when strictly greater (zero/lower no-op), set the
config tag together (tag-before-lsn release ordering for reader safety). No
ha_rejoin_reconcile, no truncation, no other mutation (Req 2.1-2.3, 3.1, 3.3).
4 revert-detecting unit tests; controller suite 0 failures.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Rongsong Shen 2026-06-20 11:52:18 +00:00
parent 282a82ff7e
commit 8bfa861be2
6 changed files with 273 additions and 1 deletions
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src/controller/meson.build
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@ -134,6 +134,7 @@ controller_unit_test_src = [
'testsuite/test_coldstart_lsn0.c',
'testsuite/test_commit_durability.c',
'testsuite/test_ctrlstatus.c',
'testsuite/test_ha_heartbeat_committed.c',
'ctrlstatus.c',
'commit.c',
'job.c',