Implement Soroban Rule Dependency Engine

[mijinummi]

🧠 Concept

Manage dependencies between analysis rules.

⚠️ Problem

Some rules require outputs from other rules.

📁 Implementation Scope

• src/rules/dependencies/stellar/

✅ Requirements

• Define rule dependencies
• Resolve execution order

🎯 Acceptance Criteria

• Dependency engine implemented
• Rules execute in correct order