docs: 同步 core/protocols.py 分层、四层治理栈、遥测新字段

ARCHITECTURE.md §2.3/§2.4/§3.1/§4/§5 + CLAUDE.md §4.8/§4.9/§5 + .env.example
对应设计 research-wiki/designs/2026-07-06-core-agent-adapters-llm-design.md §8

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.env.example

@@ -34,7 +34,7 @@ MONKEY_OCR_URLS=http://10.77.0.20:7866,http://10.77.0.20:7867
 EMBED_API_KEY=
 EMBED_API_URL=
 
-# ── Redis（响应缓存 + ARQ 任务队列）──
+# ── Redis（响应缓存）──
 REDIS_URL=redis://localhost:6379/0
 
 # ── LLM 韧性参数 ──
@@ -43,3 +43,7 @@ LLM_MAX_RETRIES=3
 LLM_RETRY_BASE_DELAY=2.0
 LLM_CIRCUIT_BREAKER_THRESHOLD=5
 LLM_CIRCUIT_BREAKER_COOLDOWN=60
+LLM_TTFT_TIMEOUT=30
+LLM_INTER_TOKEN_TIMEOUT=15
+LLM_RETRY_MAX_DELAY=30.0
+REDIS_CACHE_TTL=86400