* fix(wiki): discover nested source files in QUERY_DIRS
Two functions in the memory-wiki extension — listWikiMarkdownFiles
(wiki_get runtime lookup) and collectMarkdownFiles (wiki compile
indexing) — used fs.readdir without { recursive: true }. Nested
source files (e.g. sources/audi/car.md) were silently invisible to
both wiki_get and wiki compile.
Add recursive: true and adjust path construction using
entry.parentPath so nested .md files in all QUERY_DIRS are
discovered while preserving the index.md exclusion and backward
compatibility with flat vaults.
* fix(wiki): remove entry.path fallback, only parentPath is typed on Dirent
* fix(wiki): add recursive scan to status.ts and add nested-file regression tests
* fix(wiki): use toSorted instead of sort to pass lint
* style(memory-wiki): format recursive discovery fix
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Co-authored-by: Vincent Koc <25068+vincentkoc@users.noreply.github.com>
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