Move gateway routing metadata (session_key, platform, chat_type, origin,
display_name, memory_flushed) from sessions.json into the sessions table
in state.db. This eliminates the dual-file dependency that caused the
mcp_serve polling bug (#8925) and makes state.db the single source of
truth for session discovery.
Changes:
- Schema v7 migration: add 6 new columns to sessions table with backfill
from existing sessions.json during migration
- New SessionDB methods: set_gateway_metadata(), list_gateway_sessions(),
find_session_by_origin(), set_memory_flushed()
- Gateway session.py: write routing metadata to state.db on every
session create/reset/switch
- Rewire all consumers (mcp_serve, mirror, channel_directory, status)
to query state.db first with sessions.json fallback for pre-migration
databases
- mcp_serve _poll_once: simplified to watch only state.db mtime (fixes
the split-mtime bug from #8925 as a side effect)
sessions.json continues to be written by the gateway for now but is no
longer read as the primary source by any consumer. Can be made optional
in a future PR.
Teknium
14a5e56f6f