🐛 OpenRouter Integration Broken - MCP Schema + Qwen Support

🐛 Problem

OpenRouter integration fails preventing cost optimization and 1M free Qwen token usage.

🔍 Issues

1. MCP Schema Validation Errors (affects all OpenRouter models):

Invalid schema for function 'mcp__flow-nexus__neural_predict': array schema missing items

2. Qwen Tool Support Missing (affects qwen models):

No endpoints found that support tool use

📋 Reproduction

# Schema errors with tool-capable models
npx agentic-flow --agent coder --task "test" --provider openrouter --model "openai/gpt-4o-mini"

# Tool support errors with Qwen models  
npx agentic-flow --agent coder --task "test" --provider openrouter --model "qwen/qwen-2.5-coder-32b-instruct"

🔧 Fix Required

1. Update MCP schemas to include items for array properties
2. Implement tool emulation for Qwen models (similar to #8)

💰 Impact

Blocks 99% cost savings and 1M free Qwen token usage - core value proposition of OpenRouter integration.

🎯 Success Criteria

• Tool-capable models work via OpenRouter
• Qwen models work via tool emulation
• Cost optimization achievable

Start by running the two reproduction commands in the issue, then inspect the OpenRouter integration and MCP schema generation or validation paths. Done means tool-capable OpenRouter models no longer produce array-schema errors, and Qwen models work through tool emulation with the stated cost optimization available.