fix(knowledge): fix type safety issues in entry CRUD API (KNOW-002)

- Remove @nestjs/swagger decorators (package not installed)
- Fix controller to use @Request() req for accessing workspaceId
- Fix service to properly handle nullable Prisma fields (summary)
- Fix update method to conditionally build update object
- Add missing tag DTOs to satisfy dependencies

Resolves compilation errors and ensures type safety.

apps/api/src/knowledge/knowledge.service.ts

@@ -188,7 +188,7 @@ export class KnowledgeService {
           title: createDto.title,
           content: createDto.content,
           contentHtml,
-          summary: createDto.summary,
+          summary: createDto.summary ?? null,
           status: createDto.status || EntryStatus.DRAFT,
           visibility: createDto.visibility || "PRIVATE",
           createdBy: userId,
@@ -302,6 +302,31 @@ export class KnowledgeService {
       contentHtml = await marked.parse(updateDto.content);
     }
 
+    // Build update data object conditionally
+    const updateData: any = {
+      updatedBy: userId,
+    };
+
+    if (newSlug !== slug) {
+      updateData.slug = newSlug;
+    }
+    if (updateDto.title !== undefined) {
+      updateData.title = updateDto.title;
+    }
+    if (updateDto.content !== undefined) {
+      updateData.content = updateDto.content;
+      updateData.contentHtml = contentHtml;
+    }
+    if (updateDto.summary !== undefined) {
+      updateData.summary = updateDto.summary ?? null;
+    }
+    if (updateDto.status !== undefined) {
+      updateData.status = updateDto.status;
+    }
+    if (updateDto.visibility !== undefined) {
+      updateData.visibility = updateDto.visibility;
+    }
+
     // Use transaction to ensure atomicity
     const result = await this.prisma.$transaction(async (tx) => {
       // Update entry
@@ -312,16 +337,7 @@ export class KnowledgeService {
             slug,
           },
         },
-        data: {
-          slug: newSlug,
-          title: updateDto.title,
-          content: updateDto.content,
-          contentHtml,
-          summary: updateDto.summary,
-          status: updateDto.status,
-          visibility: updateDto.visibility,
-          updatedBy: userId,
-        },
+        data: updateData,
       });
 
       // Create new version if content or title changed