feat: standardize DeerFlow offline deployment

.gitignore

@@ -65,7 +65,10 @@ offline-backend-20260512/data/
 offline-backend-20260512/deerflow-backend-offline-image-20260505.tar
 offline-backend-20260512/extensions_config.json
 offline-backend-20260512/skills/
-offline-backend-20260512/wheelhouse/
+# Canonical DeerFlow-only offline release assets.  The base wheelhouse is
+# versioned so a clean checkout can reproduce the fully offline bundle.
+!offline-backend-20260512/wheelhouse/
+!offline-backend-20260512/wheelhouse/**
 offline-backend-20260512/backend/.deer-flow/data/*.db
 offline-backend-20260512/backend/.deer-flow/data/*.db-*
 offline-backend-20260512/backend/.deer-flow/*
@@ -119,7 +122,19 @@ offline-backend-20260512/backend/tests/*
 !offline-backend-20260512/backend/tests/test_enterprise_research_tasks.py
 # Position-roundtable per-turn write/present cap (weak-model duplicate artifacts).
 !offline-backend-20260512/backend/tests/test_position_artifact_cap.py
-deploy
+# Keep only the canonical DeerFlow-only deployment implementation and the
+# three shared build inputs it consumes.  Other historical deploy variants
+# remain local-only.
+deploy/*
+!deploy/linux-docker-offline-deerflow-only/
+!deploy/linux-docker-offline-deerflow-only/**
+deploy/linux-docker-offline-deerflow-only/**/__pycache__/
+deploy/linux-docker-offline-deerflow-only/**/*.pyc
+!deploy/linux-docker-offline/
+deploy/linux-docker-offline/*
+!deploy/linux-docker-offline/Dockerfile.backend
+!deploy/linux-docker-offline/Dockerfile.frontend
+!deploy/linux-docker-offline/sanitize_release_sources.py
 .history
 
 # Cloned third-party repos (local only)