feat: add environment variable support for Claude Code token limits

Introduces .env file configuration to manage CLAUDE_CODE_MAX_TOKENS, allowing flexible control of the context window size for AI analysis sessions. This enables users to tune token limits based on their specific penetration testing needs without modifying code.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Dockerfile

@@ -109,6 +109,7 @@ WORKDIR /app
 
 # Copy package.json and package-lock.json first for better caching
 COPY package*.json ./
+COPY .env ./.env
 
 # Install Node.js dependencies as root
 RUN npm ci --only=production && \