Phase 4: Scan analysis, PostProcessing, and Visualization integration

[lg345]

Parent: #82

Scope

Complete the migration by porting scan analysis, post-processing, and visualization to work with the new pipeline architecture.

Scan analysis

Register scan-specific steps:

• reduce_det_scanvar — bin detector by arbitrary scan variable

Workflows replaced:

• ScanAnalysis_1D
• ScanAnalysis_1D_XES

PostProcessing

Port XSpect_PostProcessing.py functions (exponential fitting, kinetics extraction) as registered steps or standalone utilities. Determine which belong in reduction vs. separate post-hoc analysis.

Visualization

Refactor XSpect_Visualization.py and XSpect_Diagnostics.py to work with the new run.results dict interface rather than getattr(run, key). The View layer reads from run.results and Pipeline.results.

Acceptance criteria

• All current analysis workflows expressible as YAML
• Visualization layer works with new results format
• No remaining imports from old XSpect_Controller subclasses
• Old controller file can be deleted