Update requirements and enhance delist recommender functionality

- Updated `requirements.txt` to include `rich>=14.0.0`, adding support for improved logging and console output.
- Modified `delist_recommender.py` to enhance error handling, including better session management for the Bybit exchange and improved logging for market data fetching.
- Implemented comprehensive checks for market names and added fallback mechanisms for data retrieval, ensuring robustness in the face of API failures.
- Introduced a new API endpoint for single market recommendations, allowing detailed analysis and visibility into the delisting process.
- Adjusted concurrency limits and timeout settings for API calls to optimize performance and reliability.

Author: goldhaxx

backend/TEST_CCXT_README.md

@@ -0,0 +1,60 @@
+# CCXT Testing Tool for Delist Recommender
+
+This tool helps diagnose issues with the CCXT implementation in the delist recommender module, specifically related to fetching market volume data for cryptocurrency tokens.
+
+## Setup
+
+1. Install required dependencies:
+   ```bash
+   pip install -r test_ccxt_requirements.txt
+   ```
+
+2. For market cap data testing, set your CoinMarketCap API key:
+   ```bash
+   export CMC_API_KEY=your_coinmarketcap_api_key_here
+   ```
+   You can get a free API key from [CoinMarketCap](https://coinmarketcap.com/api/).
+
+## Usage
+
+Basic usage:
+```bash
+python test_ccxt_implementation.py SOL-PERP
+```
+
+This will test both exchange data retrieval and market cap data for SOL.
+
+### Options
+
+- `--verbose` or `-v`: Show more detailed output, including all potential market pairs
+  ```bash
+  python test_ccxt_implementation.py SOL-PERP --verbose
+  ```
+
+- `--ccxt-only`: Only test CCXT exchange data (skip CoinMarketCap)
+  ```bash
+  python test_ccxt_implementation.py SOL-PERP --ccxt-only
+  ```
+
+- `--cmc-only`: Only test CoinMarketCap data (skip exchange data)
+  ```bash
+  python test_ccxt_implementation.py SOL-PERP --cmc-only
+  ```
+
+## Interpreting Results
+
+The script will show:
+
+1. The normalized symbol used for matching (e.g., SOL for SOL-PERP)
+2. For each exchange:
+   - Available markets matching the symbol
+   - Success/failure of data retrieval
+   - Sample volume calculations
+3. A summary table with volumes across exchanges
+4. Market cap data from CoinMarketCap if available
+
+## Troubleshooting Common Issues
+
+- **No markets found**: The exchange may not list the token, or the symbol transformation may be incorrect.
+- **Markets found but no data**: The API may be rate-limited or the market data endpoint may be unavailable.
+- **Symbol not found in CoinMarketCap**: Check for alternative symbol representations or if the token is listed under a different ticker.