Unify paired status transitions and retry handling

src/paired-execution-context-arbiter.ts

@@ -1,7 +1,9 @@
 import { ARBITER_DEADLOCK_THRESHOLD } from './config.js';
-import { updatePairedTask } from './db.js';
 import { logger } from './logger.js';
-import { classifyArbiterVerdict } from './paired-execution-context-shared.js';
+import {
+  classifyArbiterVerdict,
+  transitionPairedTaskStatus,
+} from './paired-execution-context-shared.js';
 import type { PairedTask } from './types.js';
 
 export function handleFailedArbiterExecution(args: {
@@ -15,7 +17,12 @@ export function handleFailedArbiterExecution(args: {
       ? 'arbiter_requested'
       : task.status;
   if (fallbackStatus !== task.status) {
-    updatePairedTask(taskId, { status: fallbackStatus, updated_at: now });
+    transitionPairedTaskStatus({
+      taskId,
+      currentStatus: task.status,
+      nextStatus: fallbackStatus,
+      updatedAt: now,
+    });
     logger.warn(
       {
         taskId,
@@ -45,11 +52,15 @@ export function handleArbiterCompletion(args: {
     case 'proceed':
     case 'revise':
     case 'reset':
-      updatePairedTask(taskId, {
-        status: 'active',
-        round_trip_count: Math.max(0, ARBITER_DEADLOCK_THRESHOLD - 1),
-        arbiter_verdict: arbiterVerdict,
-        updated_at: now,
+      transitionPairedTaskStatus({
+        taskId,
+        currentStatus: 'in_arbitration',
+        nextStatus: 'active',
+        updatedAt: now,
+        patch: {
+          round_trip_count: Math.max(0, ARBITER_DEADLOCK_THRESHOLD - 1),
+          arbiter_verdict: arbiterVerdict,
+        },
       });
       logger.info(
         { taskId, arbiterVerdict },
@@ -57,20 +68,28 @@ export function handleArbiterCompletion(args: {
       );
       return;
     case 'escalate':
-      updatePairedTask(taskId, {
-        status: 'completed',
-        arbiter_verdict: 'escalate',
-        completion_reason: 'arbiter_escalated',
-        updated_at: now,
+      transitionPairedTaskStatus({
+        taskId,
+        currentStatus: 'in_arbitration',
+        nextStatus: 'completed',
+        updatedAt: now,
+        patch: {
+          arbiter_verdict: 'escalate',
+          completion_reason: 'arbiter_escalated',
+        },
       });
       logger.info({ taskId }, 'Arbiter escalated to user — task completed');
       return;
     default:
-      updatePairedTask(taskId, {
-        status: 'active',
-        round_trip_count: Math.max(0, ARBITER_DEADLOCK_THRESHOLD - 1),
-        arbiter_verdict: 'unknown',
-        updated_at: now,
+      transitionPairedTaskStatus({
+        taskId,
+        currentStatus: 'in_arbitration',
+        nextStatus: 'active',
+        updatedAt: now,
+        patch: {
+          round_trip_count: Math.max(0, ARBITER_DEADLOCK_THRESHOLD - 1),
+          arbiter_verdict: 'unknown',
+        },
       });
       logger.warn(
         { taskId, summary: summary?.slice(0, 200) },