refactor(qqbot): install plugin from Tencent package (#107295)

* refactor(qqbot): remove bundled extension source

Mechanical deletion half of the #107295 squashed rebase; the catalog
repoint and host integration land in the follow-up commit.

Co-authored-by: sliverp <870080352@qq.com>

* refactor(qqbot): install plugin from Tencent package

Squashed rebase of #107295 onto current main. Repoints the official
external channel catalog at @tencent-connect/openclaw-qqbot@2.0.1 and
adapts onboarding, doctor migrations, secrets, build guards, and tests.

Documents the known limitation that the external package does not
support structured SecretRef clientSecret values; operators move those
to QQBOT_CLIENT_SECRET or clientSecretFile before upgrading.

Co-authored-by: sliverp <870080352@qq.com>

* fix(doctor): reuse shared hasOwnKey record helper

The rebased QQBot migration carried its own hasOwnKey export, colliding
with the one main now ships in legacy-config-record-shared.ts.

Co-authored-by: sliverp <870080352@qq.com>

* fix(plugins): carry catalog integrity through the update bridge

The externalized-bundled-plugin bridge dropped the official catalog's
expectedIntegrity pin, so bundled-user updates installed the external
npm package without integrity verification. The bridge now carries the
pin for the catalog's exact npm spec and both bridge install calls pass
it through; update-channel spec overrides intentionally skip the pin
since it only covers the pinned version.

Co-authored-by: sliverp <870080352@qq.com>

* chore(plugin-sdk): refresh per-entrypoint API baselines

The QQBot compat export and bundled-type removal shift 26 entrypoint
closure hashes in the new split baseline layout.

Co-authored-by: sliverp <870080352@qq.com>

* refactor(qqbot): drop helper reintroduced during rebase

Main's coercion consolidation added this file after the deletion
commit's base; its only consumers were the removed qqbot sources.

Co-authored-by: sliverp <870080352@qq.com>

---------

Co-authored-by: Peter Steinberger <steipete@gmail.com>

docs/.generated/plugin-sdk-api-baseline/provider-catalog-runtime.json

@@ -1 +1 @@
-{"contentHash":"12a68d5eb0af0b8026102f6faf695e5146e997bb3ce17882e576c8b63eb08c0c","entrypoint":"provider-catalog-runtime","importSpecifier":"openclaw/plugin-sdk/provider-catalog-runtime"}
+{"contentHash":"9bcfbbe5a2ddf62272fd953b0687d4e6d34cb80aa5de23e485c468182b79d8e4","entrypoint":"provider-catalog-runtime","importSpecifier":"openclaw/plugin-sdk/provider-catalog-runtime"}