Semiotic v3.8.2

Fixed

• MCP accessibility contract. Chart schemas, validation, repair guidance,
  accessibility audits, and getChartSchema now consistently expose the
  direct title, description, summary, and accessibleTable props.
  improveChart returns suggested accessibility prose separately with its
  canonical location, while auditChart no longer credits unsupported text.
• Public getChartSchema output. The hosted five-tool profile now declares
  and returns structured results for component lists, component schemas, and
  unknown-component errors, including direct and ChartContainer accessibility
  guidance.