fix: code review cleanup

- Add missing dependencies: ioredis, adm-zip, archiver, gray-matter, @types/multer, @types/archiver
- Fix import statements: use default imports for AdmZip, archiver, gray-matter
- Remove unused imports: ArrayMinSize
- Fix export types: use 'export type' for type-only exports
- Replace 'any' types with proper types:
  - AuthUser for user parameters
  - ExportEntry interface for entry data
  - unknown for frontmatter parsing parameters
  - Record<string, unknown> for dynamic objects
- Add security improvements:
  - File upload size limit: 50MB max
  - File type validation in FileInterceptor
  - Path traversal protection in zip extraction
  - Zip bomb protection: max 1000 files, 100MB uncompressed
- Fix exactOptionalPropertyTypes issues: use conditional spreading for optional fields

apps/api/src/knowledge/dto/import-export.dto.ts

@@ -3,7 +3,6 @@ import {
   IsOptional,
   IsEnum,
   IsArray,
-  ArrayMinSize,
 } from "class-validator";
 
 /**

apps/api/src/knowledge/dto/index.ts

@@ -10,9 +10,5 @@ export {
   RecentEntriesDto,
 } from "./search-query.dto";
 export { GraphQueryDto } from "./graph-query.dto";
-export {
-  ExportQueryDto,
-  ExportFormat,
-  ImportResult,
-  ImportResponseDto,
-} from "./import-export.dto";
+export { ExportQueryDto, ExportFormat } from "./import-export.dto";
+export type { ImportResult, ImportResponseDto } from "./import-export.dto";