feat(s3-integration): implement complete S3 integration with Zustand store and endpoints

Summary

Implement complete S3 integration for ANIR document indexing system. This PR adds:

• S3 API endpoints layer with folder listing, indexation job management, and document tracking
• Zustand-based state store with robust error handling and automatic polling
• Full integration with S3 configuration components in the ANIR wizard
• TypeScript-first implementation with complete type safety

Changes Made

New Files

• src/shared/api/endpoints/integration-service/s3-endpoints.ts

  • 7 endpoints for S3 operations
  • Helper functions for common API calls
  • Follows anir-wizard-endpoints pattern

• src/shared/api/stores/integration-service/s3-store.ts

  • Zustand store for S3 state management
  • Types: FolderNode, IndexationJob, IndexedDocument
  • Actions: folder loading, job creation/polling, document management
  • Error handling with getErrorMessage() utility
  • Automatic job status polling

Modified Files

• s3-config.tsx

  • Added S3 store import and usage
  • Auto-load folders when account is selected
  • Pass loading state to child components

• s3-guide-card.tsx

  • Added optional isLoading and error props
  • Ready for integration with store loading states

• s3-indexing-card.tsx

  • Added store import and folder/loading state access
  • Added isLoading prop to interface

• s3-frequency-card.tsx

  • Added store import for consistency
  • Access to loading state for future enhancements

API Integration

Endpoints Implemented

GET    /integrations/folders/amazon_s3/{account_uid}?prefix={prefix}
POST   /integrations/indexations/jobs
GET    /integrations/indexations/jobs/{job_id}
GET    /integrations/indexations/jobs
GET    /integrations/indexations/stats
GET    /integrations/indexations/documents
DELETE /integrations/indexations/documents/{doc_id}

Store Actions Available

• loadFoldersS3(accountUid, prefix?) - Load S3 bucket folders
• createIndexationJob(request) - Create new indexation job
• getJobStatus(jobId) - Get single job status
• listJobs(filters?) - List all jobs with optional filters
• pollJobStatus(jobId, intervalMs?) - Auto-poll until job completes
• listIndexedDocuments(filters?) - List indexed documents
• deleteDocument(docId) - Delete indexed document
• selectFolder/deselectFolder() - Manage folder selection
• clearError/reset() - State utilities

Type Safety

New Types

FolderNode - S3 folder/file structure
IndexationJob - Job tracking with progress
IndexedDocument - Document metadata after indexing
IndexationJobRequest - Job creation payload
JobFilters/DocumentFilters - Query filters