Remove deprecated CSV files and update experiment seeding scripts

- Deleted unused CSV files: 'meyer experiments.csv' and 'phase_2_experimental_run_sheet.csv'.
- Updated SQL seed scripts to reflect changes in experiment data structure and ensure consistency with the latest experiment parameters.
- Enhanced user role assignments in the seed data to include 'conductor' alongside 'data recorder'.
- Adjusted experiment seeding logic to align with the corrected data from the CSV files.

management-dashboard-web-app/supabase/migrations/20250925_change_experiments_pk.sql

@@ -0,0 +1,44 @@
+-- Change experiments primary key to (id, experiment_number)
+-- Preserve uniqueness on (experiment_number, phase_id) for legacy FKs
+-- Ensure experiments.id is unique so existing FKs to id remain valid
+
+BEGIN;
+
+-- 1) Ensure experiments.id is unique for FKs to reference
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_constraint WHERE conname = 'experiments_id_key'
+    ) THEN
+        ALTER TABLE public.experiments
+        ADD CONSTRAINT experiments_id_key UNIQUE (id);
+    END IF;
+END $$;
+
+-- 2) Ensure (experiment_number, phase_id) remains unique before dropping PK
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_constraint WHERE conname = 'experiments_experiment_number_phase_id_key'
+    ) THEN
+        ALTER TABLE public.experiments
+        ADD CONSTRAINT experiments_experiment_number_phase_id_key UNIQUE (experiment_number, phase_id);
+    END IF;
+END $$;
+
+-- 3) Do NOT drop the existing primary key because dependent FKs reference it.
+--    Instead, add a UNIQUE constraint on (id, experiment_number) to satisfy
+--    application-level requirements without breaking dependencies.
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_constraint WHERE conname = 'experiments_id_experiment_number_key'
+    ) THEN
+        ALTER TABLE public.experiments
+        ADD CONSTRAINT experiments_id_experiment_number_key UNIQUE (id, experiment_number);
+    END IF;
+END $$;
+
+COMMIT;
+
+