fix: validate nested analysis fields before merging and preparation

tests/analysis-parts.test.mjs

@@ -1,6 +1,16 @@
 import test from 'node:test';
 import assert from 'node:assert/strict';
 import {splitAnalysisText,analyzeInParts} from '../server/analysis-parts.mjs';
+test('malformed part is isolated before merge and retained as a failed source range',async()=>{
+ const out=await analyzeInParts({text:'a'.repeat(30000)},async p=>({result:p.index
+  ? {itemsAndSpecs:[{name:'Geçerli kit',quantity:'2 adet'}]}
+  : {itemsAndSpecs:[null],citations:[null]}}));
+ assert.equal(out.result.itemsAndSpecs.length,1);
+ assert.equal(out.result.sourceReview.status,'partial');
+ assert.equal(out.result.sourceReview.parts[0].status,'failed');
+ assert.equal(out.result.sourceReview.analyzedCharacters,6000);
+ await assert.rejects(()=>analyzeInParts({text:'kaynak'},async()=>({result:{citations:[null]}})),/hiçbir parçası/);
+});
 test('long Turkish source is covered once without loss, including final paragraph',()=>{
  const text=('İğdır laboratuvar 🧪\n').repeat(7000)+'SON MADDE';
  const parts=splitAnalysisText(text);assert.ok(parts.length>1);
@@ -9,7 +19,7 @@ test('long Turkish source is covered once without loss, including final paragrap
 });
 test('all source parts contribute requirements, failures remain explicit partial analysis',async()=>{
  const text='a'.repeat(60000);
- const complete=await analyzeInParts({text,fileName:'test'},async p=>({result:{documentChecklist:[{document:`Belge ${p.index}`}],sourceReview:{issues:[]}},attempts:[]}));
+ const complete=await analyzeInParts({text,fileName:'test'},async p=>({result:{documentChecklist:[{document:`Belge ${p.index}`,mandatory:true}],sourceReview:{issues:[]}},attempts:[]}));
  assert.equal(complete.result.documentChecklist.length,3);assert.equal(complete.result.sourceReview.analyzedCharacters,60000);
  assert.equal(complete.result.sourceReview.status,'review_required');assert.equal(complete.result.bidAnalysis,null);
  const partial=await analyzeInParts({text},async p=>{if(p.index===1)throw new Error('test failure');return {result:{itemsAndSpecs:[{name:'Kit',quantity:p.index?'3 adet':'2 adet'}]}};});