feat: Add LLM analysis workflow and ruff linter fixes

LLM Analysis Workflow:
- Add llm_analyzer module for AI-powered code security analysis
- Add llm_analysis workflow with SARIF output support
- Mount AI module in Python worker for A2A wrapper access
- Add a2a-sdk dependency to Python worker requirements
- Fix workflow parameter ordering in Temporal manager

Ruff Linter Fixes:
- Fix bare except clauses (E722) across AI and CLI modules
- Add noqa comments for intentional late imports (E402)
- Replace undefined get_ai_status_async with TODO placeholder
- Remove unused imports and variables
- Remove container diagnostics display from exception handler

MCP Configuration:
- Reactivate FUZZFORGE_MCP_URL with default value
- Set default MCP URL to http://localhost:8010/mcp in init

docker-compose.yml

@@ -259,6 +259,8 @@ services:
     volumes:
       # Mount workflow code (read-only) for dynamic discovery
       - ./backend/toolbox:/app/toolbox:ro
+      # Mount AI module for A2A wrapper access
+      - ./ai/src:/app/ai_src:ro
       # Worker cache for downloaded targets
       - worker_python_cache:/cache
     networks: