docs: refresh the golden-fixtures note in CLAUDE.md

The Door A description said the §11 golden fixtures "are missing today".
They shipped in 9dd86b1 as ingest-golden-{file,sql,http}/. Correct the line
to state what is present.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HBbjgS5A55RVavoyjJC4FX

CLAUDE.md

@@ -11,7 +11,8 @@ one boundary rule:
   `ingest-{id}.md` → index generation; zero model calls). This repo
   IMPLEMENTS the spec; commons keeps authorship. Spec changes the library
   needs go via commons, never edited locally. The library ships the §11
-  golden fixtures (byte-exact) that are missing today.
+  golden fixtures (byte-exact) for the three door-A source types
+  (`ingest-golden-{file,sql,http}/`, shipped in `9dd86b1`).
 - **Door B — bundle inbox:** converts dropped files to OKF concepts. All
   file-type→text extraction lives HERE (the guard is text-only). v1 core:
   `md`, `txt`, `csv`, `json`, `html` (stdlib). `pdf`/`docx`/`xlsx` only via