sub agents docs (#1266)

* docs: 添加 JSONL transcript 会话机制文档

* docs: 重构多 Agent 编排机制文档

Author: suger-m

docs.json

@@ -87,6 +87,7 @@
           "docs/internals/sentry-setup",
           "docs/internals/hidden-features",
           "docs/internals/ant-only-world",
+          "docs/internals/session-transcript-persistence",
           "docs/features/debug-mode",
           "docs/features/buddy"
         ]