Add v1.01 Release Notes with detailed feature list and file changes

Author: Charles Ramoose

RELEASE_NOTES.md

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+# BioCoin v1.01 Release Notes
+
+## Overview
+BioCoin v1.01 introduces significant backend enhancements focusing on API robustness, security, and multi-chain support. This release adds request validation, pagination, monitoring capabilities, and expands blockchain support to include Binance Smart Chain alongside Solana.
+
+## Key Features
+
+### Multi-Chain Support
+- **Binance Smart Chain Integration** - BioCoin now supports both Solana and BSC, expanding market reach
+- **Chain-Agnostic API** - Transaction endpoints work seamlessly across both blockchains
+- **Multi-Wallet Balance Checking** - Users can view balances across multiple blockchains
+
+### Backend Improvements
+- **Request Validation** - All API endpoints now validate request data using Joi
+- **Pagination** - List endpoints support standardized pagination parameters
+- **Rate Limiting** - Protection against API abuse with tiered rate limits
+- **Health Monitoring** - New endpoints for system status and performance metrics
+- **Improved Logging** - Enhanced logging with Winston for better debugging
+
+## Files Added
+
+### Middleware
+- `backend/src/middleware/validate.js` - Request validation middleware using Joi
+- `backend/src/middleware/paginate.js` - API pagination middleware
+- `backend/src/middleware/rateLimit.js` - Rate limiting for API security
+
+### Utilities
+- `backend/src/utils/validationSchemas.js` - Joi schemas for request validation
+- `backend/src/utils/logger.js` - Winston logger implementation
+
+### Routes
+- `backend/src/routes/healthRoutes.js` - Health check endpoints
+- `backend/src/routes/transactionRoutes.js` - Transaction API routes
+
+### Controllers
+- `backend/src/controllers/transactionController.js` - Transaction business logic
+
+### Services
+- `backend/src/services/blockchainService.js` - Multi-chain blockchain service
+
+### Smart Contracts
+- `contracts/src/BioCoinBSC.sol` - Solidity contract for Binance Smart Chain
+
+## Files Modified
+- `backend/package.json` - Added new dependencies
+- `backend/.env.example` - Added BSC configuration variables
+- `backend/src/index.js` - Updated core server configuration
+
+## Technical Details
+
+### API Endpoints
+- `GET /health` - Basic health check
+- `GET /health/detailed` - Detailed system information
+- `POST /api/transactions/payment` - Process payments (now supports blockchain selection)
+- `GET /api/transactions/balances` - Get balances across blockchains
+
+### Environment Configuration
+New environment variables:
+```
+BSC_RPC_URL=https://data-seed-prebsc-1-s1.binance.org:8545/
+BSC_CONTRACT_ADDRESS=your_bsc_contract_address
+```
+
+### Validation Schemas
+All API endpoints now validate requests with properly defined schemas:
+- User schemas (register, login, update)
+- Data schemas (create, update)
+- Research schemas (create, update)
+- Transaction schemas (payment processing)
+
+## Frontend Compatibility
+These backend changes are fully compatible with the existing frontend. The blockchain service allows users to choose between Solana and BSC when making transactions.