[daveshanley]

Fixes #279.

Component additions and removals shared the $.components path, so deduplication collapsed separate components into one entry per category. The reported example retained only five of 30 component additions.

Use component-name paths before deduplication for HTML, Markdown, and summary reports. The example now retains all 30 component entries and reports 47 changes: 46 additions and one modification. Raw tree data and machine-readable JSON output remain unchanged.

Validation:

• Command and full Go test suites pass; vet passes for the affected packages.
• Regression tests cover additions, removals, duplicate references, path escaping, and OpenAPI 3.2 media types. The count package has 100% statement coverage.
• Petstore remains at 42 changes and 18 breaking changes.
• Independent review has no remaining findings.

Browser verification remains incomplete because the browser policy blocked local HTML files. Generated HTML and payload checks pass.