Implement Signal Continuity Across Segments

Description: Ensure CBC signals that span multiple data segments maintain phase and amplitude continuity.

Tasks:

• Modify CBCWaveformSimulator to handle multi-segment signals
• Implement phase tracking across segment boundaries
• Add signal buffering for overlapping segments
• Update TimeSeriesMixin to support continuity requirements
• Add tests for signal continuity validation

Acceptance Criteria:

Signals spanning multiple files are continuous Phase is preserved across segment boundaries No artifacts at segment junctions