feat: add knowledge management functionality with CRUD operations and database schema

- Implemented KnowledgeHandler for managing knowledge groups and items, including listing, creating, updating, and deleting operations.
- Added database migration scripts to create necessary tables for knowledge management, including knowledge_groups, knowledge_items, knowledge_parse_tasks, and knowledge_chunks_meta.
- Introduced prompt_rule_knowledge_groups table to associate prompt rules with knowledge groups.

server/internal/tenant/transport/article_handler.go

@@ -22,11 +22,23 @@ type ArticleHandler struct {
 }
 
 func NewArticleHandler(a *bootstrap.App) *ArticleHandler {
+	knowledgeSvc := app.NewKnowledgeService(
+		a.DB,
+		a.RetrievalProvider,
+		a.VectorStore,
+		a.ObjectStorage,
+		a.Logger,
+		a.Config.Retrieval,
+		0,
+		0,
+	)
+
 	return &ArticleHandler{
 		svc: app.NewArticleService(a.DB, a.AuditLogs),
 		promptGenerateSvc: app.NewPromptRuleGenerationService(
 			a.DB,
 			a.LLM,
+			knowledgeSvc,
 			a.GenerationStreams,
 			a.Config.Generation,
 			a.Config.LLM.MaxOutputTokens,