adjust migration for seed and depresiasi

internal/database/migrations/20260604042051_seed_house_depreciation_flocks_18.down.sql

@@ -0,0 +1,8 @@
+-- Hapus baris kurva custom dari house_depreciation_standards.
+-- Exact match pada array (IDs di-sort, sama persis dengan yang di-insert).
+DELETE FROM house_depreciation_standards
+WHERE project_flock_ids = ARRAY[18]::bigint[]
+  AND effective_date = DATE '2026-06-03';
+
+-- Recompute snapshot depresiasi.
+DELETE FROM farm_depreciation_snapshots WHERE project_flock_id IN (18);