DEVX-68: feat: add pre-built Docker runner images and tested image build/push tools

Makefile

@@ -1,4 +1,4 @@
-.PHONY: all setup setup-ci setup-quality setup-release install update lint lint-all test test-unit pytest-cov clean install-tools install-hooks activate-scripts checkmake check-mutable-globals check-dep-docs check-test-speed
+.PHONY: all setup setup-ci setup-quality setup-release setup-image install update lint lint-all test test-unit pytest-cov clean install-tools install-hooks activate-scripts checkmake check-mutable-globals check-dep-docs check-test-speed build-images push-images build-images-dry-run clean-images
 
 PYTHON := python3
 VENV := .venv
@@ -30,6 +30,11 @@ setup-release: $(VENV)/bin/activate .env
 	export PATH="$(HOME)/.local/bin:$$PATH"; \
 	$(BIN)/python -m devx.tools.setup --bin "$(BIN)" --extras "ci,lint" --no-pre-commit
 
+# Setup for pre-built image jobs (deps already in image, just link venv + install project)
+setup-image:
+	@if [ -d /opt/venv ]; then ln -sf /opt/venv .venv; . .venv/bin/activate && pip install -e . --no-deps 2>/dev/null; \
+	else echo "[setup-image] /opt/venv not found — falling back to setup-ci"; $(MAKE) setup-ci; fi
+
 .env:
 	@if [ ! -f .env ]; then cp .env.example .env; echo "Created .env from .env.example — please edit it."; fi
 
@@ -105,3 +110,17 @@ pre-push: lint-all pytest-cov
 
 clean: devx-clean
 	@echo "[clean] Done."
+
+# ── Docker image management ──────────────────────────────────────────────────
+
+build-images: devx-build-images
+	@echo "[build-images] Done."
+
+push-images: devx-push-images
+	@echo "[push-images] Done."
+
+build-images-dry-run: devx-build-images-dry-run
+	@echo "[build-images-dry-run] Done."
+
+clean-images: devx-clean-images
+	@echo "[clean-images] Done."