feat(patient-status schema updated)- applied changes

migratedb.txt

@@ -0,0 +1,56 @@
+1.
+```
+npx prisma migrate dev --create-only --name add_patient_status_enum
+```
+
+2.
+```
+
+-- Create the enum type (quoted name keeps exact case)
+DO $$
+BEGIN
+  IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'PatientStatus') THEN
+    CREATE TYPE "PatientStatus" AS ENUM ('ACTIVE', 'INACTIVE', 'UNKNOWN');
+  END IF;
+END$$;
+
+-- 1) Add new enum column (nullable for backfill)
+ALTER TABLE "Patient"
+  ADD COLUMN IF NOT EXISTS "status_new" "PatientStatus";
+
+-- 2) Backfill from old text column to enum (case-insensitive)
+UPDATE "Patient"
+SET "status_new" = CASE
+  WHEN "status" IS NULL THEN 'UNKNOWN'::"PatientStatus"
+  WHEN lower("status") = 'active'   THEN 'ACTIVE'::"PatientStatus"
+  WHEN lower("status") = 'inactive' THEN 'INACTIVE'::"PatientStatus"
+  ELSE 'UNKNOWN'::"PatientStatus"
+END
+WHERE "status_new" IS NULL;
+
+-- 3) Safety: ensure no NULLs remain
+DO $$
+DECLARE cnt INTEGER;
+BEGIN
+  SELECT count(*) INTO cnt FROM "Patient" WHERE "status_new" IS NULL;
+  IF cnt > 0 THEN
+    RAISE EXCEPTION 'Migration abort: % rows have NULL status_new', cnt;
+  END IF;
+END$$;
+
+-- 4) Make new column NOT NULL and set DB default to UNKNOWN
+ALTER TABLE "Patient"
+  ALTER COLUMN "status_new" SET DEFAULT 'UNKNOWN',
+  ALTER COLUMN "status_new" SET NOT NULL;
+
+-- 5) Drop old column and rename new -> status
+ALTER TABLE "Patient" DROP COLUMN IF EXISTS "status";
+ALTER TABLE "Patient" RENAME COLUMN "status_new" TO "status";
+
+```
+
+
+3.
+```
+npx prisma migrate dev
+```