docs(i18n): core-data-structures and postmortem batch — 22 bilingual pairs

core-data-structures 18 篇（core.md 因超长仍在产出、随后补）、
postmortem 3 篇与 RFC 前门 README 配对；流水线 + 二遍校验产出。
生成文件 docs/rfc/INDEX.md（gen-rfc-index 产物）列入排除。中文侧
页内锚点统一指向英文侧锚名，满足配对门禁的链接目标一致规则。

docs/core-data-structures/workflow.md

@@ -1,5 +1,7 @@
 # Workflow
 
+English | [中文](workflow.zh.md)
+
 The workflow seam — an agent running a model-written orchestration SCRIPT that fans out subagents. Like [subagent](subagent.md) it is **one optional capability**, not part of the agent-loop spine, so its vocabulary lives here rather than in [core.md](core.md). Unlike the subagent registry it takes the bash shape: ONE engine implementation per context provides `ctx.workflows`; there is no named-provider registry (a second engine is a plugin swap, not a co-resident).
 
 Interface: [dsh-workflow](../../packages/workflow/workflow) (`ctx.workflows` + the vocabulary below). The implementation is [dsh-workflow-workerthread](../../packages/workflow/workflow-workerthread) (a `node:worker_threads` engine — one worker per run, the script's vm context inside it); the model-facing consumer is [dsh-tool-workflow](../../packages/workflow/tool-workflow). The proposal and rationale: [the dynamic-workflows RFC](../rfc/implemented/feature/2026-07-05-dynamic-workflows.md).