- ReadTool mixed plain-file reading with archive, sqlite, pdf-image, summary,
selector, formatting and renderer concerns in one 3763-line module.
- Each now owns a sibling module; read.ts drops to 2020 lines and keeps its
public exports, including the readToolRenderer re-export required because
tools/index.ts star-exports ./read through the explicit ./tools entry.
- The pdfImageExtractions map and summaryParseCaches WeakMap stay single
instances; execute() was deliberately left intact.
