Refactor and lint-clean price explorer notebook

[Mjboothaus]

Summary

• clean up examples/notebooks/price_explorer.py cell wiring names for lint-compliant marimo dependency injection
• tighten long summary row formatting and keep output rendering explicit with an intentional B018 suppression marker
• preserve notebook behaviour while removing existing lint debt in this file

Validation

• uv run ruff check examples/notebooks/price_explorer.py
• uv run marimo check examples/notebooks/price_explorer.py
• uv run pytest tests/test_notebook_support.py

Conversation: https://app.warp.dev/conversation/79aa7721-1947-44e5-840f-d20883bd8624
Plan: https://app.warp.dev/drive/notebook/eZQFltrUPlV50R8ZwHEybR

Co-Authored-By: Oz oz-agent@warp.dev

[semanticdiff-com]

Review changes with  

Changed Files

File	Status
examples/notebooks/price_explorer.py	65% smaller