Update sample handling and experiment linkage logic

Added `type` to experiment runs in `sample.py` and improved filtering in `processing.py` to match experiments by both `sample_id` and `run_id`. Removed extensive unnecessary code in `testfunctions.ipynb` for clarity and maintenance.

backend/app/routers/processing.py

@@ -24,14 +24,17 @@ async def job_event_generator(db: Session):
             sample = db.query(SampleModel).filter_by(id=job.sample_id).first()
             experiment = (
                 db.query(ExperimentParametersModel)
-                .filter(ExperimentParametersModel.sample_id == sample.id)
+                .filter(
+                    ExperimentParametersModel.sample_id == sample.id,
+                    ExperimentParametersModel.id == job.run_id,
+                )
                 .first()
             )
 
             job_item = JobsResponse(
                 job_id=job.id,
                 sample_id=sample.id,
-                run_id=getattr(experiment, "run_number", None),
+                run_id=job.run_id,
                 sample_name=sample.sample_name,
                 status=job.status,
                 type=experiment.type,