CI: Refurbish ngr invocations for Python exercises across the board

[amotl]

Just maintenance: Migrate CI configuration from pip/setup-python to uv/setup-uv and remove ngr's --accept-no-venv flags.

[coderabbitai]

Walkthrough

Replaces many GitHub Actions Python setup steps (actions/setup-python@v6) with astral-sh/setup-uv@v7, switches caching to uv glob-based caching, changes installs to uv pip install --requirements=... (some places pin setuptools<82), removes --accept-no-venv (and some --with=pueblo) from test invocations, and adds one dev dependency.

Changes

Cohort / File(s)	Summary
Application Workflows .github/workflows/application-*.yml application-apache-superset.yml, application-cratedb-toolkit.yml, application-metabase.yml, application-records.yml	Replaced setup-python with setup-uv; moved pip cache → uv cache-dependency-glob; installs changed to uv pip install --requirements=... (some with setuptools<82); removed --accept-no-venv from ngr test.
DataFrame Workflows .github/workflows/dataframe-*.yml dataframe-dask.yml, dataframe-pandas.yml, dataframe-polars.yml	Same migration to setup-uv; caching uses globbed requirements*.txt; installs via uv pip --requirements; tests now ngr test <path> without --accept-no-venv.
Framework Workflows .github/workflows/framework-*.yml framework-dlt.yml, framework-gradio.yml, framework-mcp.yml, framework-records.yml, framework-streamlit.yml	Moved to setup-uv with activate-environment: 'true'; expanded cache globs and cache-suffix; installs use uv pip --requirements; removed --accept-no-venv; one step renamed to "Install prerequisites".
Language (Python) Workflows .github/workflows/lang-python-*.yml lang-python-connectorx.yml, lang-python-dbapi.yml, lang-python-sqlalchemy.yml, lang-python-turbodbc.yml	Replaced setup-python with setup-uv; updated cache globs and cache-suffix; changed uv pip invocation (removed --system when present); tests simplified; turbodbc only adds a TODO comment.
ML / Machine-Learning Workflows .github/workflows/ml-*.yml ml-chatbot.yml, ml-langchain.yml, ml-llamaindex.yml, ml-mlflow.yml, ml-pycaret.yml	Switched to setup-uv and uv caching via globs; installs use uv pip --requirements (some places add setuptools<82); removed --accept-no-venv and removed some uv run / --with=pueblo wrappers.
Testing Workflows .github/workflows/testing-*.yml testing-native-python.yml, testing-testcontainers-python.yml	Migrated to setup-uv; caching via globbed requirement files; uv pip install --requirements= used; test invocations now ngr test <path> without --accept-no-venv.
Timeseries / Specialized .github/workflows/timeseries.yml	Replaced setup-python with setup-uv + activate-environment; expanded cache globs; added explicit uv pip install --requirements= utilities step; removed uv run wrapper and --with=pueblo / --accept-no-venv.
Requirements change topic/machine-learning/mlflow/requirements-dev.txt	Added colorlog>=6 to development requirements.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Suggested reviewers

• surister

Poem

🐰 I hopped across YAML, tidy and neat,
Swapped setup steps in CI's heartbeat.
Globs now catch deps, installs hum with uv,
Tests shed a flag — a soft carrot for me. 🥕

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: refurbishing ngr invocations across Python exercise CI workflows.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description check	✅ Passed	The PR description is directly related to the changeset, accurately summarizing the migration from pip/setup-python to uv/setup-uv and removal of --accept-no-venv flags.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci-ngr-refurbish

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