The MCP getSCIMBridge tool authorized on iam:scim-bridge:get, but no
role policy allowed that action, so every call denied — including for
owners and admins.
Owners now get the full iam:scim-bridge:* wildcard (matching the
scim-configuration and scim-event treatment in the same policy).
Admins get read-only access and are explicitly denied create/update/
delete, mirroring how scim-configuration is handled.
Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>