feat(state): add thread_history sqlite and initial migration

[owenlin0]

Description

This PR adds the SQLite schema we’ll use for paginated local thread history. It creates a new thread_history_1.sqlite database owned by codex_state::StateRuntime.

Just a migration PR, no actual reads or writes yet.

Why

We want paginated local threads to store projected turns/items in SQLite without putting that load into state_5.sqlite. Making this a separate runtime DB gives us that isolation while still using the SQLite lifecycle code we already have in StateRuntime.

What changed

• Added thread_history_1.sqlite to the StateRuntime DB inventory.
• Added the initial thread_turns, thread_items, and thread_history_projection_state schema.
• Wired the new DB through the existing runtime migration, telemetry, corruption-recovery path discovery, Bazel compile data, and shutdown flow.
• Kept this scoped to schema/runtime setup only; projection writes and paginated reads come in follow-up PRs.