* fix(auth): let internal users view search tools
Internal users could not see search tools in the UI even when an admin
created them, while vector stores were visible. The Search Tools page
rendered but its list calls 403'd because the read routes were not in
internal_user_routes. Grant internal users read-only access to the
listing and provider routes; create/update/delete stay admin-only.
Resolves LIT-3150
* fix(auth): scope /search_tools/list to caller-allowed tools
Adding the read routes to internal_user_routes let any internal user
call /search_tools/list, which returned every configured tool's id,
provider, api_base, and metadata regardless of the caller's
object_permission.search_tools allowlist. The api_key was masked, so
this was metadata disclosure rather than a credential leak, but it
ignored the key/team scoping that /search already enforces.
Filter the listing through the same can_key_call_search_tool /
can_team_call_search_tool checks (exposed as a boolean
can_user_view_search_tool), so non-admin callers only see tools they
may invoke; admins still see all. Mirrors how /vector_store/list
scopes results.
* fix(types): resolve mypy errors in list_search_tools
The config and DB build loops reused one loop variable, so mypy pinned
it to the config element type (SearchToolTypedDict); its .get() calls
returned object and the DB element (SearchTool) failed the reuse
assignment. Give each loop its own variable so each gets its real type,
and coerce the config tool's SearchToolInfoTypedDict to a plain dict to
match SearchToolInfoResponse.search_tool_info.
