ETL: Extract and Parse Revit Model Data to Structured Excel

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Convert a Revit model to Excel and parse it into structured items ready for downstream ETL. This minimal template runs a local RvtExporter.exe, checks success, derives the expected *_rvt.xlsx filename, reads it from disk, and parses it to data items in n8n. What it does Setup: define path_to_revit_converter and revit_file. Run converter: execute RvtExporter.exe "<converter>" "<revit_file>" (writes *_rvt.xlsx next to the RVT). Check success: branch on converter error output. Read Exc