refactor: remove default instruction for LlmFactExtractor

src/ingestion/llm-extractor.ts

@@ -6,9 +6,6 @@ import type {
 
 const DEFAULT_INSTRUCTIONS = [
   "Extract structured facts from the user input.",
-  "Return a JSON array of fact objects. Do not include markdown, explanations, or prose outside the JSON array.",
-  'Each fact object must have a "statement", "summary", "source", "confidence", and "topics" array.',
-  'Each topic in "topics" must have a "name", and may include "category", "granularity", and "role".',
   "Only include topics that are explicitly in the input.",
   "If the input contains multiple distinct facts, return them as separate objects in the array.",
 ].join("\n");