清理废弃代码并同步全部文档：删除钱包异动监控模块，移除已废弃功能的文档引用

- 删除 polymarket_wallet_activity_watcher.py（914行）及 runtime_coordinator 调度
- 移除 LGBM / Polymarket 价格层 / Groq / prewarm 等 v1.7.0 已废弃功能的文档引用
- 清理 6 个死文档链接，更新文档索引和版本日期
- 移除 POLYMARKET_WALLET_ACTIVITY_* / PREWARM_* 等废弃环境变量

Directive: 文档与代码同步清理，无功能变更
Tested: pytest tests/test_bot_runtime_coordinator.py pass
Confidence: high

.env.example

@@ -234,34 +234,6 @@ POLYGON_WALLET_WATCH_POLYMARKET_ONLY=true
 POLYGON_WALLET_WATCH_INCLUDE_DEFAULT_PM_CONTRACTS=true
 POLYGON_WALLET_WATCH_POLYMARKET_CONTRACTS=
 
-# Polymarket wallet activity (retired; replaced by market monitor digests + critical alerts)
-POLYMARKET_WALLET_ACTIVITY_ENABLED=false
-POLYMARKET_WALLET_ACTIVITY_USERS=
-POLYMARKET_WALLET_ACTIVITY_CHAT_ID=
-POLYMARKET_WALLET_ACTIVITY_CHAT_IDS=
-POLYMARKET_WALLET_ACTIVITY_TOPIC_CHAT_ID=
-POLYMARKET_WALLET_ACTIVITY_TOPIC_ID=
-POLYMARKET_WALLET_ACTIVITY_USER_ALIASES=
-POLYMARKET_WALLET_ACTIVITY_DATA_API_URL=https://data-api.polymarket.com
-POLYMARKET_WALLET_ACTIVITY_INTERVAL_SEC=20
-POLYMARKET_WALLET_ACTIVITY_TIMEOUT_SEC=10
-POLYMARKET_WALLET_ACTIVITY_MIN_SIZE_ABS=0.001
-POLYMARKET_WALLET_ACTIVITY_MIN_SIZE_DELTA=0.001
-POLYMARKET_WALLET_ACTIVITY_MIN_AVG_PRICE_DELTA=0.002
-POLYMARKET_WALLET_ACTIVITY_IMMEDIATE_ON_SIZE_DELTA=true
-POLYMARKET_WALLET_ACTIVITY_IMMEDIATE_SIZE_DELTA_MIN=0.001
-POLYMARKET_WALLET_ACTIVITY_IMMEDIATE_COOLDOWN_SEC=20
-POLYMARKET_WALLET_ACTIVITY_MAX_CHANGES_PER_MSG=5
-POLYMARKET_WALLET_ACTIVITY_NOTIFY_CLOSED=false
-POLYMARKET_WALLET_ACTIVITY_BOOTSTRAP_ALERT=false
-POLYMARKET_WALLET_ACTIVITY_LINK_PREVIEW=true
-POLYMARKET_WALLET_ACTIVITY_UPDATE_DEBOUNCE_SEC=30
-POLYMARKET_WALLET_ACTIVITY_UPDATE_MAX_HOLD_SEC=120
-POLYMARKET_WALLET_ACTIVITY_AVG_PRICE_SHOW_MIN=0.01
-POLYMARKET_WALLET_ACTIVITY_AVG_PRICE_SHOW_MAX=0.99
-POLYMARKET_WALLET_ACTIVITY_MIN_POSITION_VALUE_USD=0
-POLYMARKET_WALLET_ACTIVITY_MIN_VALUE_EXEMPT_USERS=
-
 ########################################
 # 8) Optional proxies
 ########################################