chore(P2): 替换mysql驱动，移除emoji统一日志格式

- mysql-connector-java → mysql-connector-j 8.0.33
- TDengineService: 移除9处emoji（✅❌⚠️）
- 统一使用SLF4J {}占位符，无字符串拼接

iot-platform/pom.xml

 
         <!-- Mysql驱动 -->
         <dependency>
-            <groupId>mysql</groupId>
-            <artifactId>mysql-connector-java</artifactId>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <version>8.0.33</version>
         </dependency>
 
         <!-- TDengine JDBC -->

iot-platform/src/main/java/com/iot/platform/service/TDengineService.java

             config.setConnectionTestQuery("SELECT NOW()");
             config.setValidationTimeout(3000);
             this.dataSource = new HikariDataSource(config);
-            log.info("✅ TDengine 连接池初始化完成");
+            log.info("TDengine 连接池初始化完成");
         } catch (Exception e) {
-            log.warn("⚠️ TDengine 连接池初始化失败: {}", e.getMessage());
+            log.warn("TDengine 连接池初始化失败: {}", e.getMessage());
             this.dataSource = null;
         }
         dataSourceInitialized = true;
             return true;
 
         } catch (SQLException e) {
-            log.error("❌ 表结构初始化失败: {}.{} | {}", dbName, table, e.getMessage());
+            log.error("表结构初始化失败: {}.{} | {}", dbName, table, e.getMessage());
             return false;
         } finally {
             if (stmt != null) try { stmt.close(); } catch (SQLException ignored) {}
             }
         }
 
-        log.info("✅ 批量写入成功: {} | 条数: {}", table, dataList.size());
+        log.info("批量写入成功: {} | 条数: {}", table, dataList.size());
         return true;
     }
 
         } catch (SQLException e) {
             // 表不存在时尝试重建表后重试
             if (e.getMessage().contains("Table does not exist")) {
-                log.warn("⚠️ 表不存在，重建表: {}", table);
+                log.warn("表不存在，重建表: {}", table);
                 initTableStructure(dbName, supertablename, table, Collections.emptySet());
                 return insertBatchRetry(dbName, supertablename, table, dataList);
             }
-            log.error("❌ 批量写入 SQL 失败: {} | 错误: {}", table, e.getMessage());
+            log.error("批量写入 SQL 失败: {} | 错误: {}", table, e.getMessage());
             return false;
         } finally {
             if (stmt != null) try { stmt.close(); } catch (SQLException ignored) {}
             stmt.executeUpdate(finalSql);
             return true;
         } catch (SQLException e) {
-            log.error("❌ 重试插入失败: {} | 错误: {}", table, e.getMessage());
+            log.error("重试插入失败: {} | 错误: {}", table, e.getMessage());
             return false;
         } finally {
             if (stmt != null) try { stmt.close(); } catch (SQLException ignored) {}
                         escapeValue(supertablename)
                 );
                 stmt.executeUpdate(tableSql);
-                log.info("✅ 子表创建成功: {}", table);
+                log.info("子表创建成功: {}", table);
             }
         } catch (SQLException e) {
             log.warn("检查表存在性失败，继续尝试插入: {}", e.getMessage());