Why: the job runs the full backend suite against real services; internal/runtime lint tests require python-docx (job 2290: ModuleNotFoundError 'docx') which the plain test job already installs. Evidence: job 2290 log; all PG/Redis-dependent packages green in the same run (store 2.6s, pgbus, runmgr, ratelimit, server). Impact: test-pg job setup only. Refs: Dev PR #325.