feat(observer): emit chain_ref in primary_rationale

tools/observer-transcript-parser.mjs

@@ -16,6 +16,14 @@
  */
 
 import { detectChoiceProvenance, detectAskUserQuestionChoice } from './observer-choice-detector.mjs';
+import { loadChainMap, chainsFor } from './observer-chain-detector.mjs';
+
+let CHAIN_MAP = null;
+try {
+  CHAIN_MAP = loadChainMap();
+} catch {
+  CHAIN_MAP = new Map(); // битый/отсутствующий JSON -> chainsFor вернёт null, observer не падает
+}
 
 const SUPERPOWERS_PREFIX = 'superpowers:';
 
@@ -694,6 +702,7 @@ export function parseTranscript(transcriptText, fallbackSessionId = null) {
       return {
         step: 1,
         node_chosen: skills.length > 0 ? skills[0] : 'direct',
+        chain_ref: chainsFor(skills.length > 0 ? skills[0] : 'direct', CHAIN_MAP),
         triggers_matched: merge(extractTriggers(turn), tag ? tag.triggers : []),
         candidates_considered: merge(extractCandidates(turn), tag ? tag.candidates : []),
         boundaries_applied: merge(extractBoundaries(turn), tag ? tag.boundaries : []),