Description
EN. The EvolutionEngine runs incrementally after writes or on compact(),
which is fine for small stores but stalls at scale. Re-architect it to run
asynchronously: a durable work queue of evolution tasks (merge, resolve, stage
advance, distill), idempotent workers, backpressure, and progress/metrics via
the observability layer (src/contextseek/observability/). Writes should enqueue
work and return fast; evolution happens in the background.
Tasks: design the task model + queue (pluggable: in-process, then a real
broker); make each evolution step idempotent & retry-safe; expose metrics and a
CLI/HTTP status view; ensure compact() can still run synchronously for tests;
load-test and document.
Acceptance: writes are not blocked by evolution; background processing is
observable, idempotent, and recoverable after a crash.
ZH. EvolutionEngine 现在在写后或 compact() 时增量运行，小库没问题，规模上来就
会卡。请将其重构为异步运行：一个持久化的进化任务队列（合并、消解、阶段晋升、蒸馏）、
幂等 worker、背压、以及经可观测层（src/contextseek/observability/）暴露进度/指标。
写入只入队并快速返回，进化在后台进行。
任务： 设计任务模型 + 队列（可插拔：先进程内，再接真正的 broker）；让每个进化步骤
幂等、可重试；暴露指标和 CLI/HTTP 状态视图；保证 compact() 仍能同步运行以便测试；
做压测并文档化。
验收： 写入不被进化阻塞；后台处理可观测、幂等、崩溃后可恢复。
Description
EN. The EvolutionEngine runs incrementally after writes or on
compact(),which is fine for small stores but stalls at scale. Re-architect it to run
asynchronously: a durable work queue of evolution tasks (merge, resolve, stage
advance, distill), idempotent workers, backpressure, and progress/metrics via
the observability layer (
src/contextseek/observability/). Writes should enqueuework and return fast; evolution happens in the background.
Tasks: design the task model + queue (pluggable: in-process, then a real
broker); make each evolution step idempotent & retry-safe; expose metrics and a
CLI/HTTP status view; ensure
compact()can still run synchronously for tests;load-test and document.
Acceptance: writes are not blocked by evolution; background processing is
observable, idempotent, and recoverable after a crash.
ZH. EvolutionEngine 现在在写后或
compact()时增量运行，小库没问题，规模上来就会卡。请将其重构为异步运行：一个持久化的进化任务队列（合并、消解、阶段晋升、蒸馏）、
幂等 worker、背压、以及经可观测层（
src/contextseek/observability/）暴露进度/指标。写入只入队并快速返回，进化在后台进行。
任务： 设计任务模型 + 队列（可插拔：先进程内，再接真正的 broker）；让每个进化步骤
幂等、可重试；暴露指标和 CLI/HTTP 状态视图；保证
compact()仍能同步运行以便测试；做压测并文档化。
验收： 写入不被进化阻塞；后台处理可观测、幂等、崩溃后可恢复。