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/openapi.json

@@ -4040,6 +4040,110 @@
         }
       }
     },
+    "/delivery/parsePDF": {
+      "post": {
+        "tags": [
+          "Delivery"
+        ],
+        "summary": "Parse PDF (SSE)",
+        "description": "Accepts a PDF invoice or delivery note (`multipart/form-data`, field `pdf`)\nand streams extraction results as Server-Sent Events until parsing is complete.\n\nThe PDF is read via `pdftotext -layout` and fed page-by-page to an LLM\n(OpenRouter) which fills a structured manifest of header data and line items.\nThe OpenRouter API key is read from the authenticated user's company setting\n`keys.openrouter`; the endpoint returns `400` if the key is not configured.\n\nThe stream ends after the final `result` event (or an `error` event on failure).\n",
+        "security": [
+          {
+            "cookieAuth": []
+          }
+        ],
+        "x-markdown": "delivery/parsePDF.md",
+        "x-sse-events": [
+          {
+            "name": "status",
+            "description": "PDF parse confirmation and LLM status messages",
+            "payload": "{ \"message\": \"…\" }"
+          },
+          {
+            "name": "llm_call",
+            "description": "Fired before each LLM request",
+            "payload": "{ \"model\": \"…\", \"promptSize\": 0, \"messages\": 0 }"
+          },
+          {
+            "name": "tool_call",
+            "description": "Fired when the output_manifest tool is invoked",
+            "payload": "{ \"name\": \"output_manifest\" }"
+          },
+          {
+            "name": "usage",
+            "description": "Token usage after each LLM response",
+            "payload": "{ \"input\": 0, \"cached\": 0, \"output\": 0, \"cost\": 0 }"
+          },
+          {
+            "name": "progress",
+            "description": "Intermediate accumulated extraction state (basedata / notes / items)",
+            "payload": "ManifestResult"
+          },
+          {
+            "name": "result",
+            "description": "Final accumulated extraction — emitted just before the stream closes",
+            "payload": "ManifestResult"
+          },
+          {
+            "name": "error",
+            "description": "Emitted on PDF parse or LLM failure; stream closes immediately after",
+            "payload": "{ \"message\": \"…\" }"
+          }
+        ],
+        "requestBody": {
+          "required": true,
+          "content": {
+            "multipart/form-data": {
+              "schema": {
+                "type": "object",
+                "required": [
+                  "pdf"
+                ],
+                "properties": {
+                  "pdf": {
+                    "type": "string",
+                    "format": "binary",
+                    "description": "PDF file to parse (max 50 MB, application/pdf)"
+                  }
+                }
+              }
+            }
+          }
+        },
+        "responses": {
+          "200": {
+            "description": "`text/event-stream` — emits `status`, `llm_call`, `tool_call`, `usage`,\n`progress`, `result` (and `error` on failure). See SSE Events table below.\n\n**ManifestResult shape** (used by `progress` and `result`):\n\n```json\n{\n  \"basedata\": {\n    \"date\": \"2026-01-15\",\n    \"kLieferant\": 42,\n    \"lieferantName\": \"Muster GmbH\",\n    \"manifestNr\": \"LS-2026-001\",\n    \"manifestType\": \"lieferschein\"\n  },\n  \"notes\": [\"Pos. 3: VPE-Angabe fehlte, Standardwert 1 angenommen.\"],\n  \"items\": {\n    \"pagesFrom\": 1,\n    \"pagesTo\": 2,\n    \"items\": [\n      {\n        \"position\": 1,\n        \"count\": 10,\n        \"vpe\": 1,\n        \"unit\": \"Stk.\",\n        \"articleName\": \"Einhängesieb Stahl\",\n        \"liefArtNr\": \"ES-100\",\n        \"mwst\": \"19\",\n        \"eknetto\": 450,\n        \"page\": 1\n      }\n    ]\n  }\n}\n```\n",
+            "content": {
+              "text/event-stream": {
+                "schema": {
+                  "type": "string"
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "No PDF uploaded or OpenRouter key not configured",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Unauthorized",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
     "/delivery": {
       "get": {
         "tags": [