中性化运行上下文字段

apps/backend/src/db/migrations/001_fulfillment_rebuild.sql

@@ -209,7 +209,7 @@ CREATE INDEX IF NOT EXISTS idx_task_events_task_created_at ON task_events(task_i
 CREATE TABLE IF NOT EXISTS task_runtime_contexts (
   id BIGSERIAL PRIMARY KEY,
   task_id BIGINT NOT NULL UNIQUE REFERENCES fulfillment_tasks(id) ON DELETE CASCADE,
-  browser_session_id TEXT NOT NULL DEFAULT '',
+  runtime_session_id TEXT NOT NULL DEFAULT '',
   login_type TEXT NOT NULL DEFAULT '',
   nickname TEXT NOT NULL DEFAULT '',
   role_id TEXT NOT NULL DEFAULT '',

apps/backend/src/db/migrations/009_rename_runtime_session_id.sql

@@ -0,0 +1,20 @@
+DO $$
+BEGIN
+  IF to_regclass('public.task_runtime_contexts') IS NOT NULL
+     AND EXISTS (
+       SELECT 1
+       FROM information_schema.columns
+       WHERE table_schema = 'public'
+         AND table_name = 'task_runtime_contexts'
+         AND column_name = 'browser_session_id'
+     )
+     AND NOT EXISTS (
+       SELECT 1
+       FROM information_schema.columns
+       WHERE table_schema = 'public'
+         AND table_name = 'task_runtime_contexts'
+         AND column_name = 'runtime_session_id'
+     ) THEN
+    ALTER TABLE task_runtime_contexts RENAME COLUMN browser_session_id TO runtime_session_id;
+  END IF;
+END $$;