feat: add IVIM workflow DAG with MinIO integration and platform documentation

Unique-Usman · Unique-Usman · commit 4e1b369d665f · 2025-07-24T20:32:39.000+05:30
- Created a custom Airflow DAG for Kaapana that:
  - Retrieves input files (e.g., bvec, bval) from MinIO using MinioInputOperator
  - Processes data via IVIM Operator using nifti_wrapper_kaapana.py
  - Saves outputs back to MinIO using MinioSaveOperator
  - Utilizes OPERATOR_IN_DIR and OPERATOR_OUT_DIR volume mounts
  - Cleans up intermediate files with CleanOperator

- Added diagram (workflow_extension.png) showing DAG structure
- Structured project under `kaapana_ivim_osipi/` with clear separation of Docker, workflows, and processing code
- Documented Otsus method extension installation steps
- README: Added full Kaapana platform installation guide
diff --git a/kaapana_ivim_osipi b/kaapana_ivim_osipi
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