Initial implementation of log retrieval server with REST API

[rteeter]

Implements a minimal log retrieval server that provides REST API access to system logs in /var/log.

Key Features:

• HTTP REST API for accessing log files
• Results returned in reverse chronological order
• Query parameters for filename, line limits, and text filtering
• Token-based authentication support
• No external dependencies

Example usage:

# Start server with authentication
python src/log_retrieval_server.py -t mysecrettoken

# Retrieve logs
curl -H "Authorization: Bearer mysecrettoken" "http://localhost:8000/logs?filename=system.log&lines=100"