Add shared document renderer dependency
Why: Task 10 requires Backend to consume the reviewed canonical renderer and its embedded organization-default candidate without copying assets. Evidence: Fresh GOMODCACHE resolution loaded agent-document-renderer/profiles and passed its package tests at d449b9f779f2f968f8ac556b89940a6c9aaf3fdc. Impact: Adds one immutable Renderer gitlink plus the local Go module require/replace; no production path changes yet. Refs: Unified Document Renderer Task 10; Renderer d449b9f779f2f968f8ac556b89940a6c9aaf3fdc
This commit is contained in: