Enhance knowledge base functionality and integrate S3 storage support

- Add new models for `KnowledgeDocument` and `KnowledgeChunk` to manage document ingestion and chunking.
- Implement S3-compatible storage integration for knowledge documents, allowing for file uploads and retrieval.
- Introduce API endpoints for managing knowledge bases and documents, including creation, deletion, and searching.
- Update frontend components to support knowledge base configuration and document management, improving user interaction.
- Enhance backend services for knowledge processing and retrieval, ensuring robust handling of document statuses and errors.

frontend/src/components/pages/AssistantPage.tsx

@@ -664,7 +664,7 @@ export function AssistantPage(props: AssistantPageProps) {
           ...(form.voice ? { TTS: form.voice } : {}),
           ...(form.realtimeModel ? { Realtime: form.realtimeModel } : {}),
         },
-        knowledgeBaseId: form.knowledgeBase || null,
+        knowledgeBaseId: form.runtimeMode === "pipeline" ? form.knowledgeBase || null : null,
         toolIds: form.toolIds,
         prompt: form.prompt,
       }),
@@ -1900,18 +1900,20 @@ export function AssistantPage(props: AssistantPageProps) {
             />
           </SectionCard>
 
-          <SectionCard
-            icon={<Database size={18} />}
-            title="知识库配置"
-            description="选择助手回答时可检索的业务知识来源"
-          >
-            <ResourceSelectField
-              value={form.knowledgeBase}
-              onChange={(value) => updateForm("knowledgeBase", value)}
-              options={kbOptions}
-              noneLabel="无"
-            />
-          </SectionCard>
+          {form.runtimeMode === "pipeline" && (
+            <SectionCard
+              icon={<Database size={18} />}
+              title="知识库配置"
+              description="选择助手回答时可检索的业务知识来源"
+            >
+              <ResourceSelectField
+                value={form.knowledgeBase}
+                onChange={(value) => updateForm("knowledgeBase", value)}
+                options={kbOptions}
+                noneLabel="无"
+              />
+            </SectionCard>
+          )}
 
           <SectionCard
             icon={<Wrench size={18} />}