Contract step for BUZZ-315. Migration 0061 drops the 32
community_write_fence_* triggers (partition clones follow) and the five
fence-only functions: enforce_community_write_fence,
attach_community_write_fence, community_write_fence_excluded_table,
community_write_allowed and assert_community_write_allowed. It runs under
SET LOCAL lock_timeout = '5s' so the AccessExclusive DDL cannot queue serving
traffic indefinitely.
The desired-state schema, reconcile script and migration source assertions
follow. New inventories leave the legacy fenced_tables snapshot empty, and
the live-fence catalog reader is deleted. community_deletion_lock_key and the
community tombstone stay.
Deploy gate: merge only after the app-side admission PR, the tenant-admitted
fleet sweeps and the fence-object tolerance PR are deployed on every pod,
with no rollback below them expected.
Signed-off-by: Elrond <28d6302a099e5225b02c4155ac4236e4912603df2ab08dbfc2f4fef08ce598c8@buzz.block.builderlab.xyz>
