feat: add Anthropic API client and knowledge graph extraction pipeline

src/lib/api.js

@@ -33,7 +33,7 @@ export const anthropicApi = {
           },
           body: JSON.stringify({
             model: model,
-            max_tokens: 4000,
+            max_tokens: 8192,
             temperature: 0,
             system: systemPrompt,
             messages: [{ role: 'user', content: userMessage }]

src/lib/extractionPipeline.js

@@ -4,6 +4,7 @@ import * as db from './db';
 const SYSTEM_PROMPT = `You are an AI knowledge extractor for Respellion, an IT company built on radical transparency.
 You receive a source text. Your task is to extract core concepts, roles, and processes, and return them as a structured JSON Knowledge Graph.
 Facts should be integrated into the descriptions of the other labels and NOT be extracted as unique topics.
+CRITICAL: To ensure the response fits within limits, extract a maximum of 15 key topics and their most important relations. Keep descriptions very concise.
 
 ALWAYS return a valid JSON object in the following format:
 {