feat: 新增关键词类型及优化查询逻辑

支持关键词类型区分，优化文件向量查询SQL及DAO更新逻辑，移除冗余配置和注释代码。

model/entity/keyword.go

@@ -1,27 +1,34 @@
 package entity
 
-import "gitea.com/red-future/common/beans"
+import (
+	"rag/consts/keyword"
+
+	"gitea.com/red-future/common/beans"
+)
 
 type keywordCol struct {
 	beans.SQLBaseCol
-	DatasetId  string
-	DocumentId string
-	Word       string
-	Weight     string
+	DatasetId   string
+	DocumentId  string
+	Word        string
+	Weight      string
+	KeywordType string
 }
 
 var KeywordCol = keywordCol{
-	SQLBaseCol: beans.DefSQLBaseCol,
-	DatasetId:  "dataset_id",
-	DocumentId: "document_id",
-	Word:       "word",
-	Weight:     "weight",
+	SQLBaseCol:  beans.DefSQLBaseCol,
+	DatasetId:   "dataset_id",
+	DocumentId:  "document_id",
+	Word:        "word",
+	Weight:      "weight",
+	KeywordType: "keyword_type",
 }
 
 type Keyword struct {
 	beans.SQLBaseDO `orm:",inline"`
-	DatasetId       int64  `orm:"dataset_id" json:"datasetId" dc:"数据集ID"`
-	DocumentId      int64  `orm:"document_id" json:"documentId" dc:"文件ID"`
-	Word            string `orm:"word" json:"word" dc:"关键词"`
-	Weight          int16  `orm:"weight" json:"weight" dc:"权重"`
+	DatasetId       int64               `orm:"dataset_id" json:"datasetId" dc:"数据集ID"`
+	DocumentId      int64               `orm:"document_id" json:"documentId" dc:"文件ID"`
+	Word            string              `orm:"word" json:"word" dc:"关键词"`
+	Weight          int16               `orm:"weight" json:"weight" dc:"权重"`
+	KeywordType     keyword.KeywordType `orm:"keyword_type" json:"keywordType" dc:"类型"`
 }