Add AI module with A2A wrapper and task agent

- Disable FuzzForge MCP connection (no Prefect backend)
- Add a2a_wrapper module for programmatic A2A agent tasks
- Add task_agent (LiteLLM A2A agent) on port 10900
- Create volumes/env/ for centralized Docker config
- Update docker-compose.yml with task-agent service
- Remove workflow_automation_skill from agent card

ai/agents/task_agent/docker-compose.yml

@@ -0,0 +1,24 @@
+version: '3.8'
+
+services:
+  task-agent:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: fuzzforge-task-agent
+    ports:
+      - "10900:8000"
+    env_file:
+      - ../../../volumes/env/.env
+    environment:
+      - PORT=8000
+      - PYTHONUNBUFFERED=1
+    volumes:
+      # Mount volumes/env for runtime config access
+      - ../../../volumes/env:/app/config:ro
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8000/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3