feat: Complete Week 2 - Document Processing Pipeline

- Implement multi-format document support (PDF, XLSX, CSV, PPTX, TXT, Images)
- Add S3-compatible storage service with tenant isolation
- Create document organization service with hierarchical folders and tagging
- Implement advanced document processing with table/chart extraction
- Add batch upload capabilities (up to 50 files)
- Create comprehensive document validation and security scanning
- Implement automatic metadata extraction and categorization
- Add document version control system
- Update DEVELOPMENT_PLAN.md to mark Week 2 as completed
- Add WEEK2_COMPLETION_SUMMARY.md with detailed implementation notes
- All tests passing (6/6) - 100% success rate

pyproject.toml

@@ -24,6 +24,7 @@ python-multipart = "^0.0.6"
 python-jose = {extras = ["cryptography"], version = "^3.3.0"}
 passlib = {extras = ["bcrypt"], version = "^1.7.4"}
 python-dotenv = "^1.0.0"
+redis = "^5.0.1"
 httpx = "^0.25.2"
 aiofiles = "^23.2.1"
 pdfplumber = "^0.10.3"