docs: add realtime module fixes implementation plan

Create comprehensive plan for fixing 13 critical issues:
- 5 P0 critical issues (security, deadlocks, memory leaks)
- 5 P1 high priority issues (stability, performance)
- 3 P2 medium priority issues (optimization)

Estimated timeline: 4 weeks
Target: Production-ready realtime modules

Author: TexasCoding

docs/code-review/v3.3.0/REALTIME_FIXES_PLAN.md

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+# Realtime Module Critical Fixes Implementation Plan
+
+## Overview
+This document tracks the implementation of fixes for 13 critical issues identified in the realtime modules during the v3.3.0 code review.
+
+## Issues Priority Matrix
+
+| Priority | Issue | Risk Level | Estimated Fix Time | Status |
+|----------|-------|------------|-------------------|---------|
+| P0 | JWT Token Security | 🔴 CRITICAL | 2 hours | ⏳ Pending |
+| P0 | Token Refresh Deadlock | 🔴 CRITICAL | 4 hours | ⏳ Pending |
+| P0 | Memory Leak (Tasks) | 🔴 CRITICAL | 1 day | ⏳ Pending |
+| P0 | Race Condition (Bars) | 🔴 CRITICAL | 2 days | ⏳ Pending |
+| P0 | Buffer Overflow | 🔴 CRITICAL | 1 day | ⏳ Pending |
+| P1 | Connection Health | 🟡 HIGH | 1 day | ⏳ Pending |
+| P1 | Circuit Breaker | 🟡 HIGH | 1 day | ⏳ Pending |
+| P1 | Statistics Leak | 🟡 HIGH | 4 hours | ⏳ Pending |
+| P1 | Lock Contention | 🟡 HIGH | 2 days | ⏳ Pending |
+| P1 | Data Validation | 🟡 HIGH | 1 day | ⏳ Pending |
+| P2 | DataFrame Optimization | 🟢 MEDIUM | 2 days | ⏳ Pending |
+| P2 | Dynamic Limits | 🟢 MEDIUM | 1 day | ⏳ Pending |
+| P2 | DST Handling | 🟢 MEDIUM | 4 hours | ⏳ Pending |
+
+## Implementation Phases
+
+### Phase 1: Critical Security & Stability (Week 1)
+**Goal**: Fix all P0 issues that could cause immediate production failures
+
+#### 1. JWT Token Security Fix
+- [ ] Move JWT from URL parameters to Authorization headers
+- [ ] Update all SignalR hub connection configurations
+- [ ] Add tests for secure token handling
+- [ ] Verify no token exposure in logs
+
+#### 2. Token Refresh Deadlock Fix
+- [ ] Add timeout to reconnection attempts
+- [ ] Implement proper lock release on failure
+- [ ] Add connection state recovery mechanism
+- [ ] Test token refresh under various scenarios
+
+#### 3. Task Lifecycle Management
+- [ ] Create managed task registry
+- [ ] Implement task cleanup mechanism
+- [ ] Add task monitoring and metrics
+- [ ] Test under high-frequency load
+
+#### 4. Race Condition Fix
+- [ ] Implement fine-grained locking per timeframe
+- [ ] Add atomic DataFrame updates
+- [ ] Implement rollback on partial failures
+- [ ] Stress test concurrent operations
+
+#### 5. Buffer Overflow Handling
+- [ ] Implement dynamic buffer sizing
+- [ ] Add overflow detection and alerting
+- [ ] Implement data sampling on overflow
+- [ ] Test with extreme data volumes
+
+### Phase 2: High Priority Stability (Week 2)
+**Goal**: Fix P1 issues that affect system reliability
+
+#### 6. Connection Health Monitoring
+- [ ] Implement heartbeat mechanism
+- [ ] Add latency monitoring
+- [ ] Create health status API
+- [ ] Add automatic reconnection triggers
+
+#### 7. Circuit Breaker Implementation
+- [ ] Add circuit breaker to event processing
+- [ ] Configure failure thresholds
+- [ ] Implement fallback mechanisms
+- [ ] Test failure recovery scenarios
+
+#### 8. Statistics Memory Fix
+- [ ] Implement bounded counters
+- [ ] Add rotation mechanism
+- [ ] Create cleanup schedule
+- [ ] Monitor memory usage
+
+#### 9. Lock Optimization
+- [ ] Profile lock contention points
+- [ ] Implement read/write locks
+- [ ] Add lock-free data structures where possible
+- [ ] Benchmark improvements
+
+#### 10. Data Validation Layer
+- [ ] Add price sanity checks
+- [ ] Implement volume validation
+- [ ] Add timestamp verification
+- [ ] Create rejection metrics
+
+### Phase 3: Performance & Reliability (Week 3)
+**Goal**: Fix P2 issues for long-term stability
+
+#### 11. DataFrame Optimizations
+- [ ] Implement lazy evaluation
+- [ ] Add batching for operations
+- [ ] Optimize memory allocation
+- [ ] Profile and benchmark
+
+#### 12. Dynamic Resource Limits
+- [ ] Implement adaptive buffer sizing
+- [ ] Add memory pressure detection
+- [ ] Create scaling algorithms
+- [ ] Test across different environments
+
+#### 13. DST Transition Handling
+- [ ] Add timezone transition detection
+- [ ] Implement proper bar alignment
+- [ ] Test across DST boundaries
+- [ ] Add logging for transitions
+
+## Testing Requirements
+
+### Unit Tests
+Each fix must include:
+- Positive test cases
+- Negative test cases
+- Edge case coverage
+- Performance benchmarks
+
+### Integration Tests
+- High-frequency data simulation (10,000+ ticks/sec)
+- 48-hour endurance test
+- Network failure scenarios
+- Token refresh cycles
+- Memory leak detection
+
+### Performance Validation
+- Memory usage must remain stable over 48 hours
+- Latency must not exceed 10ms p99
+- Zero data loss under normal conditions
+- Graceful degradation under extreme load
+
+## Success Criteria
+
+### Security
+- [ ] No JWT tokens in logs or URLs
+- [ ] All authentication uses secure headers
+- [ ] Token refresh without service interruption
+
+### Stability
+- [ ] Zero deadlocks in 48-hour test
+- [ ] Memory usage bounded and stable
+- [ ] Automatic recovery from disconnections
+- [ ] No data corruption under load
+
+### Performance
+- [ ] Lock contention reduced by 50%
+- [ ] Memory usage reduced by 30%
+- [ ] Processing latency < 10ms p99
+- [ ] Support 10,000+ ticks/second
+
+## Risk Mitigation
+
+### During Implementation
+- Create feature flags for gradual rollout
+- Implement comprehensive logging
+- Add metrics and monitoring
+- Maintain backward compatibility
+
+### Rollback Plan
+- Each fix must be independently revertible
+- Maintain previous version compatibility
+- Document rollback procedures
+- Test rollback scenarios
+
+## Documentation Updates
+
+### Code Documentation
+- [ ] Update all modified function docstrings
+- [ ] Add inline comments for complex logic
+- [ ] Update architecture diagrams
+- [ ] Create migration guide
+
+### User Documentation
+- [ ] Update API documentation
+- [ ] Add troubleshooting guide
+- [ ] Document new configuration options
+- [ ] Create performance tuning guide
+
+## Timeline
+
+| Week | Focus | Deliverables |
+|------|-------|--------------|
+| Week 1 | Critical Fixes (P0) | Security and stability fixes |
+| Week 2 | High Priority (P1) | Reliability improvements |
+| Week 3 | Performance (P2) | Optimization and polish |
+| Week 4 | Testing & Documentation | Full validation and docs |
+
+## Sign-off Requirements
+
+- [ ] All tests passing
+- [ ] Code review completed
+- [ ] Security review passed
+- [ ] Performance benchmarks met
+- [ ] Documentation updated
+- [ ] Production deployment plan approved
+
+---
+
+**Last Updated**: 2025-01-22
+**Status**: Planning Phase
+**Target Completion**: 4 weeks