feat: 更新机器人配置并添加数据库迁移脚本

- 将bot_config_template.toml中的版本升级至7.9.0
- 增强数据库配置选项以支持PostgreSQL
- 引入一个新脚本，用于在SQLite、MySQL和PostgreSQL之间迁移数据
- 实现一个方言适配器，用于处理特定于数据库的行为和配置

src/chat/message_manager/batch_database_writer.py

@@ -238,6 +238,14 @@ class BatchDatabaseWriter:
                     stmt = stmt.on_duplicate_key_update(
                         **{key: value for key, value in update_data.items() if key != "stream_id"}
                     )
+                elif global_config.database.database_type == "postgresql":
+                    from sqlalchemy.dialects.postgresql import insert as pg_insert
+
+                    stmt = pg_insert(ChatStreams).values(stream_id=stream_id, **update_data)
+                    stmt = stmt.on_conflict_do_update(
+                        index_elements=[ChatStreams.stream_id],
+                        set_=update_data
+                    )
                 else:
                     # 默认使用SQLite语法
                     from sqlalchemy.dialects.sqlite import insert as sqlite_insert
@@ -264,6 +272,14 @@ class BatchDatabaseWriter:
                 stmt = stmt.on_duplicate_key_update(
                     **{key: value for key, value in update_data.items() if key != "stream_id"}
                 )
+            elif global_config.database.database_type == "postgresql":
+                from sqlalchemy.dialects.postgresql import insert as pg_insert
+
+                stmt = pg_insert(ChatStreams).values(stream_id=stream_id, **update_data)
+                stmt = stmt.on_conflict_do_update(
+                    index_elements=[ChatStreams.stream_id],
+                    set_=update_data
+                )
             else:
                 from sqlalchemy.dialects.sqlite import insert as sqlite_insert