fix(extraction): improve JSON extraction prompts and model options for invoice and bank statement tests

test/test.invoices.extraction.ts

@@ -197,6 +197,10 @@ async function extractInvoiceFromMarkdown(markdown: string, queryId: string): Pr
         { role: 'user', content: JSON_EXTRACTION_PROMPT },
       ],
       stream: true,
+      options: {
+        num_ctx: 32768,  // Larger context for long invoices + thinking
+        temperature: 0,  // Deterministic for JSON extraction
+      },
     }),
     signal: AbortSignal.timeout(120000), // 2 min timeout
   });