medication tracking started

backend/src/db/schema.ts

@@ -281,12 +281,29 @@ export const ensureSchema = async (database: DatabaseClient = db) => {
       created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
     );
 
+    CREATE TABLE IF NOT EXISTS medications (
+      id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+      bird_id UUID NOT NULL REFERENCES birds(id) ON DELETE CASCADE,
+      name VARCHAR(160) NOT NULL,
+      dosage VARCHAR(160) NOT NULL,
+      frequency VARCHAR(160) NOT NULL,
+      route VARCHAR(80),
+      start_date DATE NOT NULL,
+      end_date DATE,
+      notes VARCHAR(1000),
+      created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+      CHECK (end_date IS NULL OR end_date >= start_date)
+    );
+
     CREATE INDEX IF NOT EXISTS idx_weight_records_bird_recorded_on
       ON weight_records (bird_id, recorded_on DESC);
 
     CREATE INDEX IF NOT EXISTS idx_vet_visits_bird_visited_on
       ON vet_visits (bird_id, visited_on DESC);
 
+    CREATE INDEX IF NOT EXISTS idx_medications_bird_start_date
+      ON medications (bird_id, start_date DESC);
+
     DO $$
     BEGIN
       IF EXISTS (