feat: 添加对 langfuse 监控的支持 (#242)

* docs: 更新类型检查的 CLAUDE.md

* feat: 添加模型 1M 上下文切换

* chore: remove prefetchOfficialMcpUrls call on startup

* docs: 添加 git commit 规范

* feat: 第一次接入 langfuse

* fix: 修复 generation 的计时的错误

* feat: 添加多 agent 的监控

* feat: 添加 /poor 省流模式，toggle 关闭 extract_memories 和 prompt_suggestion

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* chore: 修复 lock 文件

* chore: 更新类型依赖

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

src/entrypoints/init.ts

@@ -49,6 +49,7 @@ import { isBetaTracingEnabled } from '../utils/telemetry/betaSessionTracing.js'
 import { getTelemetryAttributes } from '../utils/telemetryAttributes.js'
 import { setShellIfWindows } from '../utils/windowsPaths.js'
 import { initSentry } from '../utils/sentry.js'
+import { initLangfuse, shutdownLangfuse } from '../services/langfuse/index.js'
 
 // initialize1PEventLogging is dynamically imported to defer OpenTelemetry sdk-logs/resources
 
@@ -154,6 +155,10 @@ export const init = memoize(async (): Promise<void> => {
     // Initialize Sentry for error reporting (no-op if SENTRY_DSN not set)
     initSentry()
 
+    // Initialize Langfuse tracing (no-op if keys not configured)
+    initLangfuse()
+    registerCleanup(shutdownLangfuse)
+
     // Preconnect to the Anthropic API — overlap TCP+TLS handshake
     // (~100-200ms) with the ~100ms of action-handler work before the API
     // request. After CA certs + proxy agents are configured so the warmed