feat: 添加数据库配置和相关模型定义

update.sql

@@ -1 +1,43 @@
------------张斌2025-06-16 15:00:00--------------
+-----------张斌2025-06-16 15:00:00--------------
+
+--------------------pgsql创建rag_keyword表语句---------------------------
+-- 关键词表（文档关键词+权重）
+CREATE TABLE IF NOT EXISTS rag_keyword (
+    -- 基础字段（完全对齐项目规范）
+    id BIGINT PRIMARY KEY, -- 主键ID（非自增）
+    tenant_id BIGINT NOT NULL DEFAULT 0, -- 租户ID int8
+    creator VARCHAR(64) NOT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updater VARCHAR(64) NOT NULL,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    deleted_at timestamp(6),
+
+    -- 业务字段
+    dataset_id BIGINT NOT NULL, -- 数据集ID
+    document_id BIGINT NOT NULL, -- 文件ID
+    word VARCHAR(255) NOT NULL, -- 关键词
+    weight SMALLINT NOT NULL DEFAULT 0 -- 权重
+    );
+
+-- 索引（按业务高频查询）
+CREATE INDEX idx_keyword_tenant_id ON rag_keyword(tenant_id);
+CREATE INDEX idx_keyword_dataset_id ON rag_keyword(dataset_id);
+CREATE INDEX idx_keyword_document_id ON rag_keyword(document_id);
+CREATE INDEX idx_keyword_word ON rag_keyword(word);
+CREATE INDEX idx_keyword_deleted_at ON rag_keyword(deleted_at);
+
+-- 表和字段注释
+COMMENT ON TABLE rag_keyword IS 'RAG关键词表（文档关键词+权重）';
+COMMENT ON COLUMN rag_keyword.id IS '主键ID（非自增）';
+COMMENT ON COLUMN rag_keyword.tenant_id IS '租户ID';
+COMMENT ON COLUMN rag_keyword.creator IS '创建人';
+COMMENT ON COLUMN rag_keyword.created_at IS '创建时间';
+COMMENT ON COLUMN rag_keyword.updater IS '更新人';
+COMMENT ON COLUMN rag_keyword.updated_at IS '更新时间';
+COMMENT ON COLUMN rag_keyword.deleted_at IS '删除时间（软删）';
+COMMENT ON COLUMN rag_keyword.dataset_id IS '数据集ID';
+COMMENT ON COLUMN rag_keyword.document_id IS '文档ID';
+COMMENT ON COLUMN rag_keyword.word IS '关键词';
+COMMENT ON COLUMN rag_keyword.weight IS '权重';
+
+--------------------pgsql创建rag_keyword表语句---------------------------