feat(delivery): add POST /delivery/parsePDF SSE route

- Accepts multipart/form-data PDF, streams LLM extraction via SSE
- Uses libllmorbiter (OpenRouterProvider) with API key from companysetting keys.openrouter
- Extracts manifest basedata, notes, and line items from invoices/delivery notes
- Events: status, llm_call, tool_call, usage, progress, result, error
- Extends generateApiDocs.js: multipart field table + x-sse-events table support
- Docs: docs/api/routes/delivery/parsePDF.md (auto-generated)

docs/api/README.md

@@ -75,6 +75,7 @@ Generated from `@openapi` annotations in [`src/api/routes/`](../../src/api/route
 | [`routes/customergroup/update.md`](routes/customergroup/update.md) | `PATCH /customergroup/{id}` |
 | [`routes/delivery/list.md`](routes/delivery/list.md) | `GET /delivery` |
 | [`routes/delivery/create.md`](routes/delivery/create.md) | `POST /delivery` |
+| [`routes/delivery/parsePDF.md`](routes/delivery/parsePDF.md) | `POST /delivery/parsePDF` |
 | [`routes/delivery/delete.md`](routes/delivery/delete.md) | `DELETE /delivery/{id}` |
 | [`routes/delivery/get.md`](routes/delivery/get.md) | `GET /delivery/{id}` |
 | [`routes/delivery/update.md`](routes/delivery/update.md) | `PATCH /delivery/{id}` |