feat(server): add persistent PTY daemon API

[jlongster]

Summary

• add a database-scoped, authenticated client for the persistent opencode-pty daemon and protocol v6
• expose session-scoped terminal list/create, terminal lifecycle/snapshots, replay, controller takeover, and authenticated WebSocket streams
• use sessionID as the daemon's internal grouping key without a public group abstraction
• publish ephemeral persistent-pty.added and persistent-pty.removed invalidation events for multi-client synchronization
• wire explicit service shutdown and regenerate Promise/Effect clients plus OpenAPI

Verification

• package typechecks across Schema, Core, Protocol, Server, Client, and CLI
• real opencode-pty v0.1.4 integration covers two terminals for one session, snapshots, replay, control, lifecycle, and added/removed SSE events
• generated clients and OpenAPI refreshed

Stack: 1/4; next PR embeds the native daemon into CLI artifacts.