* fix(skills): preserve Markdown table cells in data-analysis exports
* docs(skills): document Markdown cell escaping contract
Clarify handling of Markdown exports and escaping rules.
* docs: describe data-analysis Markdown export escaping
Clarify data-analysis skill features and behavior in README.
* test(skills): cover Markdown export headers and multiline cells
Add a test for markdown export functionality in data analysis.
- Remove f-string prefix on 7 strings with no placeholders (F541)
in analyze.py, aggregate_benchmark.py, run_loop.py, generate_review.py
- Remove unused `os` import in quick_validate.py (F401)
Found by ruff via HUMMBL Arbiter (https://hummbl.io/audit).
Unifies market analysis, data analysis, and consulting reporting into a comprehensive consulting-analysis skill, enabling a two-phase workflow from analysis framework design to professional report generation. Introduces a DuckDB-based data analysis utility for Excel/CSV files and a chart-visualization skill with a flexible JS interface and extensive chart type documentation. Removes the legacy market analysis skill to streamline report generation and improve extensibility for consulting and data-driven workflows.