Wires the sovereign docmark MCP server (git.d-ma.be/mathias/docmark) as the
converter for formats ingestion previously couldn't handle at all -- DOCX,
XLSX, PPTX, PNG/JPG. A single self-contained tools/call POST (docmark runs
stateless_http, no session handshake needed) does the conversion.
- internal/extract/docmark.go: extractViaDocmark(path) -- reads DOCMARK_URL +
DOCMARK_BEARER_TOKEN from env, base64-encodes the file, calls docmark's
convert_to_markdown tool, surfaces tool/HTTP errors with context.
- internal/extract/extract.go: routes .docx/.xlsx/.pptx/.png/.jpg/.jpeg to it.
- internal/api/handler.go: isSupportedExtension() replaces the static
supportedExtensions map -- the new extensions are gated on DOCMARK_URL being
set, checked per-request. When DOCMARK_URL is unset (e.g. this repo's
current deployed state), behavior is byte-for-byte unchanged from today:
same 400/silent-skip as before. Zero risk until the env var is actually
wired in infra.
TDD throughout: docmark.go tested via httptest mock (success, not-configured,
tool-error, HTTP-error, all 6 new extensions route correctly); handler-level
test proves the DOCMARK_URL gate (docx 400 when unset, 200 when a working
mock is configured). Full task check green (fmt/vet/govulncheck/all tests).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
