feat(heartbeat): 添加版本号字段并处理亮度值-1为NULL

- 在心跳事件表中新增 version 字段，用于存储版本号信息
- 将 bright_g 字段的 -1 值映射为数据库中的 NULL，避免语义混淆
- 更新相关文档、数据库迁移脚本和测试用例

src/db/databaseManager.js

@@ -420,6 +420,7 @@ class DatabaseManager {
       'comm_seq',
       'insert_card',
       'bright_g',
+      'version',
       'elec_address',
       'air_address',
       'voltage',
@@ -453,7 +454,8 @@ class DatabaseManager {
       e.device_count,
       e.comm_seq,
       e.insert_card ?? null,
-      e.bright_g ?? null,
+      (e.bright_g === -1 || e.bright_g === '-1') ? null : (e.bright_g ?? null),
+      e.version ?? null,
       Array.isArray(e.elec_address) ? e.elec_address : null,
       Array.isArray(e.air_address) ? e.air_address : null,
       Array.isArray(e.voltage) ? e.voltage : null,

src/processor/heartbeatProcessor.js

@@ -514,6 +514,7 @@ class HeartbeatProcessor {
       comm_seq: pick(['comm_seq', 'commSeq', 'CommSeq']),
       insert_card: pick(['insert_card', 'insertCard', 'InsertCard']),
       bright_g: pick(['bright_g', 'brightG', 'BrightG']),
+      version: pick(['version', 'Version', 'ver', 'Ver']),
       extra: pick(['extra', 'Extra']),
       electricity: pick(['electricity', 'Electricity']),
       air_conditioner: pick(['air_conditioner', 'airConditioner', 'AirConditioner']),
@@ -566,7 +567,9 @@ class HeartbeatProcessor {
     normalized.device_count = toIntOrUndefined(normalized.device_count);
     normalized.comm_seq = toIntOrUndefined(normalized.comm_seq);
     normalized.insert_card = toIntOrUndefined(normalized.insert_card);
-    normalized.bright_g = toIntOrUndefined(normalized.bright_g);
+    const bg = toIntOrUndefined(normalized.bright_g);
+    normalized.bright_g = bg === -1 ? undefined : bg;
+    normalized.version = toIntOrUndefined(normalized.version);
 
     // 其余未知字段塞进 extra（避免丢信息），但不覆盖显式 extra
     if (!normalized.extra || typeof normalized.extra !== 'object') {
@@ -591,6 +594,7 @@ class HeartbeatProcessor {
           'comm_seq','commSeq','CommSeq',
           'insert_card','insertCard','InsertCard',
           'bright_g','brightG','BrightG',
+          'version','Version','ver','Ver',
           'extra','Extra',
           'electricity','Electricity',
           'air_conditioner','airConditioner','AirConditioner'