adding weight edits

backend/src/repositories/birdRepository.ts

@@ -895,6 +895,27 @@ export const createWeightForBird = async (birdId: string, weightGrams: number, r
   return result.rows[0] ?? null;
 };
 
+export const updateWeightForBird = async (
+  weightId: string,
+  birdId: string,
+  weightGrams: number,
+  recordedOn: string,
+  notes: string | null,
+) => {
+  const result = await db.query<WeightRow>(
+    `UPDATE weight_records
+     SET weight_grams = $3,
+         recorded_on = $4,
+         notes = $5
+     WHERE id = $1
+       AND bird_id = $2
+     RETURNING id, bird_id, weight_grams, recorded_on::text, notes`,
+    [weightId, birdId, weightGrams, recordedOn, notes],
+  );
+
+  return result.rows[0] ?? null;
+};
+
 export const listVetVisitsForBird = async (birdId: string, workspaceId: number) => {
   const result = await db.query<VetVisitRow>(
     `SELECT id, bird_id, visited_on::text, clinic_name, reason, notes