feat: Implement Comprehensive Fee Collection Validation and Safety Mechanisms

[Jagadeeshftw]

This MR implements comprehensive fee collection validation and safety mechanisms to enhance the security, transparency, and reliability of fee operations in the Predictify Hybrid contract.

✨ New Features

Data Structures

• FeeCollectionStatus: Comprehensive status information with eligibility checks, warnings, and recommendations
• FeeDistribution: Fee distribution tracking across multiple recipients with audit trails
• FeeRefund: Complete refund record system for error handling and user protection
• FeeSafetyValidation: Safety validation results with risk scoring and recommendations

Core Functions

1. validate_fee_collection() - Comprehensive fee validation with safety checks
2. track_fee_distribution() - Fee distribution tracking and verification
3. verify_fee_collection_safety() - Safety validation with risk assessment
4. emit_fee_collection_event() - Enhanced event emission for monitoring
5. refund_fee_on_error() - Robust error handling with refund mechanisms
6. get_fee_collection_status() - Real-time status monitoring and reporting
7. validate_fee_distribution() - Distribution accuracy and compliance validation

🔒 Safety & Security Enhancements

Validation Layers

• Market state validation (resolved, not collected, sufficient stakes)
• Fee amount validation (minimum/maximum limits, calculation accuracy)
• Admin authorization and permission checks
• Distribution recipient and amount validation

Safety Scoring System

• 0-100 safety score with risk level assessment (Low/Medium/High/Critical)
• Comprehensive safety checks with detailed recommendations
• Risk factor identification and mitigation suggestions

Error Handling & Recovery

• Automatic fee refunds on validation failures
• Complete audit trails for all refund operations
• Error event emission for monitoring and alerting
• Graceful degradation with user protection mechanisms

📊 Monitoring & Analytics

Event System Integration

• Enhanced fee collection events with performance metrics
• Distribution tracking events for transparency
• Error logging events for operational monitoring
• Analytics integration for fee collection insights

Audit & Compliance

• Complete fee operation audit trails
• Distribution verification and tracking
• Refund history and error tracking
• Compliance-ready reporting capabilities

🧪 Testing & Quality Assurance

Test Coverage

• All existing tests pass (106/106) ✅
• New functionality thoroughly tested
• Edge cases and error scenarios covered
• Backward compatibility verified

Code Quality

• Symbol length compliance (≤9 characters)
• Comprehensive error handling
• Clean, documented code structure
• Performance optimized implementations

🔄 Backward Compatibility

• All existing fee collection functionality preserved
• No breaking changes to public APIs
• Enhanced functionality without disruption
• Seamless integration with existing systems

📈 Expected Impact

Security Improvements

• Reduced risk of fee collection errors
• Enhanced validation prevents invalid operations
• Comprehensive safety checks protect user funds
• Robust error handling with automatic recovery

Operational Benefits

• Real-time fee collection status monitoring
• Transparent fee distribution tracking
• Automated safety validation and recommendations
• Enhanced audit capabilities for compliance

User Experience

• Clear status information and recommendations
• Automatic refunds on validation failures
• Transparent fee operation tracking
• Improved error messaging and guidance

🔗 Related Issues

• Closes Implement Comprehensive Fee Collection Validation and Safety Mechanisms #67 - Implement Comprehensive Fee Collection Validation and Safety Mechanisms

✅ Checklist

• All functions implemented as specified in issue Implement Comprehensive Fee Collection Validation and Safety Mechanisms #67
• Comprehensive validation and safety checks
• Fee distribution tracking and verification
• Event emission and monitoring integration
• Error handling with refund mechanisms
• Status monitoring and reporting
• All tests passing (106/106)
• Code compiles successfully
• Symbol length compliance
• Backward compatibility maintained
• Documentation and comments added

🚀 Deployment Notes

• No breaking changes - safe to deploy
• Enhanced fee collection security and transparency
• Improved monitoring and audit capabilities
• Better user protection and error recovery

This MR significantly enhances the fee collection system's security, reliability, and transparency while maintaining full backward compatibility and adding comprehensive monitoring capabilities.

[Jagadeeshftw]

@greatest0fallt1me Please review this PR

[greatest0fallt1me]

@Jagadeeshftw Solid PR — appreciate the effort! 💪