Scale tenant reconciliation - #699
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## Summary ### Why? Reconciling every configured tenant on every subscription tick multiplies idle MySQL work when one process serves many tenants. ### What? - Schedule tenant discovery, heartbeats, lease maintenance, purges, and orphan sweeps independently by tenant. - Share recent tenant activity across pipeline topics while preserving tenant-scoped Vitess queries. - Add deterministic scheduler coverage and retain the configured gateway integration tenant correction. ## Test Plan ✅ `./tool/bazel test //platform/extension/messagequeue/... //service/messagequeue:go_default_test` ✅ `./tool/bazel test //test/integration/extension/messagequeue/mysql:go_default_test //test/integration/extension/messagequeue/mysql/vitess:go_default_test --strategy=TestRunner=local` ✅ `./tool/bazel test //test/integration/submitqueue/gateway:go_default_test --strategy=TestRunner=local` ✅ `./tool/bazel test //test/e2e/submitqueue:go_default_test --strategy=TestRunner=local` ✅ `make lint && make check-tidy && make check-gazelle` Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
Why?
Reconciling every configured tenant on every subscription tick multiplies idle MySQL work when one process serves many tenants.
What?
Test Plan
✅
./tool/bazel test //platform/extension/messagequeue/... //service/messagequeue:go_default_test✅
./tool/bazel test //test/integration/extension/messagequeue/mysql:go_default_test //test/integration/extension/messagequeue/mysql/vitess:go_default_test --strategy=TestRunner=local✅
./tool/bazel test //test/integration/submitqueue/gateway:go_default_test --strategy=TestRunner=local✅
./tool/bazel test //test/e2e/submitqueue:go_default_test --strategy=TestRunner=local✅
make lint && make check-tidy && make check-gazelleCo-authored-by: Cursor cursoragent@cursor.com