A secondary-owned Yuanbao bot keyed its per-group dispatch queue and RecallGuard
entries with the free `build_session_key(source)` — no profile, so `agent:main:` —
while `handle_message` popped under `agent:<owner>:`. Two derivations of one
identity: the group queue was shared across bots and the RecallGuard entries
leaked. Weixin, Telegram's photo batch, Slack's thread key and Raft's wake key
each carried their own copy of the call as well.
Every adapter-side key now comes from `BasePlatformAdapter._source_session_key`
/ `_event_session_key` (owner namespace, runner-seeded isolation flags, and —
after the RoutingIdentity PR — the pinned identity). Weixin's `_text_batch_key`
override is deleted (the base does the same). Slack's thread key reads the
isolation flags from the adapter config the runner seeds, not the store's.
Lint: pattern P32 in `scripts/ci/profile_scope_patterns.json` flags
`build_session_key(` / `SessionSource(` under `gateway/platforms/**` and
`plugins/platforms/**` except `platforms/base.py`; the checker gains an optional
`path_regex` per pattern. Advisory, like every other pattern.
Phase 2 of #88715.
c07708671d