refactor: modularize SendoWorkerService into focused modules and full Wallet Integration

[standujar]

Summary

Refactored the monolithic SendoWorkerService (1223 lines) into a modular architecture with 9 specialized modules, reducing the main service to 257 lines (-79%).

Key Changes

• 9 new modules with single responsibilities (WorldManager, ProviderCollector, DataSelector, DataExecutor, ActionCategorizer, AnalysisGenerator, RecommendationGenerator, DecisionProcessor, AnalysisRepository)
• SendoWorkerService now acts as orchestrator, delegating to modules
• Improved error handling with proper error type classification (initialization/execution/technical)
• Better testability - unit tests now test modules directly
• Integration tests updated to use proper service loading mechanism

Test Plan

• All unit tests passing (9 test files)
• Integration tests updated and passing
• Build successful
• Error handling properly categorizes error types