Knowledge wiki: add 'report' as type alias for 'note'

[mindsocket]

Context

From the memory-wiki comparison (issue #100). memory-wiki treats report as a distinct page kind (auto-generated dashboard pages live under reports/). The knowledge wiki's note type already covers personal notes, rough thoughts, and non-URL content — report is a natural alias for it rather than a new type.

Task

Add report to the aliases map in schemas/_knowledge_wiki.json, alongside existing aliases like comparison and query:

"aliases": {
  "report": "note",
  ...
}

Acceptance criteria

• type: report in frontmatter is accepted by any schema using _knowledge_wiki and normalised to note
• Existing note validation rules and behaviour unchanged
• Schema examples and tests updated if needed

Reference

docs/memory-wiki-research.md — "types and mapping" note

[mindsocket]

Dropping this — 'report' maps more naturally to synthesis than note, and synthesis already covers structured write-ups and findings documents. No alias needed.