Implement Alert Analysis Agent with GPT-5 Pro

Develop the 'Alert Analyst' agent. This agent should receive a raw security alert (JSON format) and use GPT-5 Pro to parse, summarize, and categorize the threat, assigning a severity level. Implement RAG using a simulated threat intelligence database (e.g., a local JSON file or simple vector store) to provide context. The output should conform to the `ThreatAnalysisTask` output format.