b67ec6b5 — non-mutating DOCX review for the dashboard review panel.

Extends the same server-side-path contract document_structure_endpoint above already established (works for self-hosted/tunnel setups; a hosted server has no filesystem access to the caller's document and returns an error). Delegates to meridian_docs.docs_intel.build_document_review — never re-derives finding detection or anchor-resolution logic here — so the response shape is exactly that function's contract: findings grouped by category (structure/equation/caption/section_page/ownership/ provenance/render_integrity) and severity, each carrying a locate_anchor-style locator instead of a raw paragraph id alone.

Pass expected_source_fingerprint (a value previously returned as source_fingerprint) to detect the document changing since a stashed review — a mismatch returns {"status": "stale", ...} rather than resolving findings against what may now be the wrong document.

9c1a3fd2 — pass ?journal=jcshm (or any name list_journal_style_presets reports, built-in or user-saved on this server) to also check the document against that journal's verified formatting rules (equation style + caption bold/punctuation). Omit it and this route behaves exactly as before 9c1a3fd2 — no style_policy, so those two finding sources contribute nothing, identical to the prior response shape. An unknown journal name returns {"error": ...} naming the known presets rather than silently falling back to unchecked.

Returns {"error": ...} (never a 500) when: the project doesn't exist (404 instead — same as document_structure_endpoint), path is missing, journal doesn't resolve to a known preset, the file can't be read/parsed, or the meridian-docs extension is not installed on this server.