Align MySQL and SQLite schemas, migrations, usage, stats, export, and backfill behavior with the shared data contracts. Extend gateway startup and maintenance support across all SQL drivers.
Refresh the resolved user role without bypassing owner group and key policies. Resolve Rust 1.95 Clippy failures and make the pending persistence bound test scheduler-independent.
Shard and singleflight hot-path caches, batch and prioritize candidate and usage lifecycle persistence, and extend database and pressure-test instrumentation for 20k concurrent streams.