feat(brain): surface router-gate v4 signals into episode + factor axes

Co-Authored-By: Claude Opus 4.8 noreply@anthropic.com

tools/observer-transcript-parser.mjs

@@ -28,6 +28,8 @@ import { buildHookMap, resolveScriptCounts } from './observer-hook-resolver.mjs'
 // для слепого fallback на heuristic recommended_node — убрано 2026-05-26
 // (brain-retro #6 follow-up). Импорты сняты как dead code.
 import { loadRegistry } from './registry-load.mjs';
+import { extractV4Signals } from './observer-v4-signals.mjs';
+import { JUDGE_PER_CALL_USD } from './cost-pricing.mjs';
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
 
@@ -847,6 +849,12 @@ export function parseTranscript(transcriptText, fallbackSessionId = null, option
   const ended_at = stamps[stamps.length - 1] || started_at;
   const durationMs = new Date(ended_at) - new Date(started_at);
 
+  const _v4 = extractV4Signals(sessionId, {
+    startMs: new Date(started_at).getTime(),
+    endMs: new Date(ended_at).getTime(),
+    baseDir: options.runtimeBaseDir || routerStateBaseDir,
+  });
+
   const { skills, counts, errors } = collectToolUse(turn);
 
   const events = [];
@@ -887,7 +895,7 @@ export function parseTranscript(transcriptText, fallbackSessionId = null, option
 
   return {
     schema_version: 4,
-    schema_minor: 3,
+    schema_minor: 4,
     task_id: sessionId,
     task_ref: sessionId,
     timestamps: { started_at, ended_at },
@@ -910,7 +918,12 @@ export function parseTranscript(transcriptText, fallbackSessionId = null, option
     // NB: routerState (line 855) honours routerStateBaseDir option; _state at line 898
     // does not (always default dir). Use routerState here so tests with custom temp dir
     // see the merged values.
-    task_cost: { ...extractTokenUsage(turn), ...((routerState && routerState.task_cost) || {}) },
+    task_cost: {
+      ...extractTokenUsage(turn),
+      ...((routerState && routerState.task_cost) || {}),
+      judge_spend_usd: _v4.judge_calls * JUDGE_PER_CALL_USD,
+    },
+    v4_signals: _v4,
     // Pass 3 — dynamics meta-block (project-brain-factor-analysis-4passes).
     // prompt_length_chars: strlen of first user prompt (engagement / clarity proxy).
     // mcp_servers_used: unique mcp__<server>__* fingerprints in this turn.