GHSA-9JXX-VJRV-H2RQ Docling imports plugin entry points before the allow_external_plugins check

Summary allowexternalplugins=False the default, and the CLI default is meant to restrict docling to its own model plugins. However, docling's plugin factories call pluggy's loadsetuptoolsentrypoints, which imports every module registered under docling's plugin entry-point group. Only afterwards...