project.ce_sessions.last_activity_at stores Date.now() epoch milliseconds but
was declared integer in both the Drizzle shape and the CE plugin schema-hook
DDL, overflowing PG int4 during the SQLite -> PostgreSQL first-boot
auto-migration and blocking startup at task-store init. Now bigint in both
sites, with an idempotent ALTER for datadirs that already materialized the
integer column, plus a schema-wide invariant test that no numeric
*_at/*_time/*_timestamp column is 32-bit integer.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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