- Add __init__.py to app/, routers/, services/ packages
- Fix docs_url typo in FastAPI app config
- Metrics: add CPU cores, memory (swap), network I/O, uptime; configurable cpu_threshold query param
- AWS S3: fix timezone-aware date comparison
- AWS EC2: fully implement endpoint (was stub) - lists all instances with ID, name tag, type, state, IPs, AZ, running duration
- Log Analysis: new service (log_service.py) with regex parser, per-level counts, health status, recent errors/warnings
- Log Analysis: new router (logs.py) with GET /logs/analyze (server-side file) and POST /logs/analyze/upload (file upload)
- Add bundled app.log sample file
- Update requirements.txt: uvicorn[standard], python-multipart

- logs_agent.py: full CLI with argparse (--file, --query, --host, --model flags)
- Interactive mode with 5 preset queries (count levels, errors, warnings, full health report, timeline)
- Custom query mode for ad-hoc natural language log analysis
- Improved system prompt with strict DevOps-focused persona
- build_agent(), run_single_query(), run_interactive() functions for clean structure
- Graceful error handling for missing Ollama / log file not found
- app.log: replaced duplicate/noisy data with realistic 60-line production log
  (includes INFO, DEBUG, WARNING, ERROR, CRITICAL with real-world scenarios)
- README.md: full setup guide (Ollama install, model pull, venv, CLI usage,
  preset query table, architecture diagram, troubleshooting guide)