feat: make FactExtractor extracts multiple facts per input

src/ingestion/extractor.ts

@@ -2,11 +2,15 @@ import { IdentityDBError } from '../core/errors';
 import { normalizeTopicName } from '../core/utils';
 import type { FactExtractor, ExtractedFact } from './types';
 
-export async function extractFact(
+export async function extractFacts(
   input: string,
   extractor: FactExtractor,
-): Promise<ExtractedFact> {
+): Promise<ExtractedFact[]> {
   const extracted = await extractor.extract(input);
+  return extracted.map((fact) => validateAndNormalizeFact(input, fact));
+}
+
+function validateAndNormalizeFact(input: string, extracted: ExtractedFact): ExtractedFact {
   const statement = extracted.statement?.trim() || input.trim();
 
   if (statement.length === 0) {
@@ -31,12 +35,12 @@ export async function extractFact(
     throw new IdentityDBError('Extractor returned no usable topics.');
   }
 
-    return {
-      statement,
-      summary: extracted.summary ?? null,
-      source: extracted.source ?? null,
-      confidence: extracted.confidence ?? null,
-      metadata: extracted.metadata ?? null,
-      topics: Array.from(dedupedTopics.values()),
-    };
+  return {
+    statement,
+    summary: extracted.summary ?? null,
+    source: extracted.source ?? null,
+    confidence: extracted.confidence ?? null,
+    metadata: extracted.metadata ?? null,
+    topics: Array.from(dedupedTopics.values()),
+  };
 }