This commit fixes critical issues with the database encryption system:
**Database Write Operations Fixed:**
- Modified credential creation/update operations to use EncryptedDBOperations
- Fixed SSH data and credential access to properly decrypt data
- All sensitive data writes now go through encryption layer
**Database Schema Migration:**
- Added missing columns (private_key, public_key, detected_key_type) to ssh_credentials table
- Fixed "no such column" SQLite errors during encrypted operations
**Application Startup Order:**
- Fixed DatabaseEncryption initialization timing issues
- Moved encryption-dependent modules to load after encryption initialization
- Prevents "DatabaseEncryption not initialized" errors
**Key Management Improvements:**
- Enhanced EncryptedDBOperations.insert() to return properly decrypted data with all fields
- Fixed TypeScript type issues with database insert operations
- Improved error handling for database encryption context
All credential operations now properly encrypt sensitive data including SSH keys,
passwords, and authentication tokens before writing to database.
