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

docker/ci-quality/Dockerfile

@@ -0,0 +1,17 @@
+# ci-quality — image for lint, type-checking, badge generation.
+#
+# Used by: quality (lint-all + pytest-cov + checks), badges (generate_badges
+#          runs ruff/pyright/bandit to produce quality badge)
+#
+# Layers on top of ci-base: adds lint tools + actionlint + checkmake.
+
+FROM git.oblachno.oblachno.fyi/oblachno-oss/runner-images:ci-base-latest
+
+# Install devx[lint] from local source (adds ruff, pyright, bandit, etc.)
+COPY . /tmp/devx
+RUN pip install --no-cache-dir /tmp/devx[lint] \
+    && rm -rf /tmp/devx
+
+# Install CI/CD binary tools
+RUN python3 -m devx.tools.install_tools --tool actionlint \
+    && python3 -m devx.tools.install_checkmake