feat(industrial): update TypeScript types for Float→Decimal USD field migration (GOO-27)

Migration SQL (20260422120000_industrial_usd_to_decimal) and Prisma schema already
reflected Decimal(18,4). This commit completes the TypeScript / frontend layer.

API changes:
- Domain repo interfaces (IndustrialListingListItem, IndustrialListingDetailData,
  IndustrialParkListItem, IndustrialParkDetailData, IndustrialMarketData): USD money
  fields changed from number|null → string|null (PostgreSQL numeric serialises
  as string in raw query results)
- Raw DB interface types in Prisma repositories updated to string|null for
  Decimal columns
- toDomain() mappers: parseFloat() added where entity props require number|null
  for business-logic arithmetic
- estimate-industrial-rent handler: Number() cast on Prisma ORM Decimal objects
  before arithmetic and comparisons

Web changes:
- khu-cong-nghiep-api.ts: IndustrialParkListItem, IndustrialParkDetail,
  IndustrialListingItem, IndustrialMarketData USD fields → string|null with JSDoc
- listing-card.tsx: parseFloat() wrapping for priceUsdM2/totalLeasePrice display
- park-compare-client.tsx: parseFloat() for landRentUsdM2Year in radar score

Note: pre-existing test failures in filter-bar/login/search specs are unrelated
to this migration (confirmed present on branch before this change).

Co-Authored-By: Paperclip <noreply@paperclip.ing>

prisma/migrations/20260422120000_industrial_usd_to_decimal/migration.sql

@@ -0,0 +1,16 @@
+-- Migrate IndustrialPark and IndustrialListing USD money fields from
+-- double precision (Float) to numeric(18, 4) (Decimal) to preserve exact
+-- precision for money. USING casts keep existing data intact.
+
+-- IndustrialPark
+ALTER TABLE "IndustrialPark"
+  ALTER COLUMN "landRentUsdM2Year" TYPE numeric(18, 4) USING "landRentUsdM2Year"::numeric(18, 4),
+  ALTER COLUMN "rbfRentUsdM2Month" TYPE numeric(18, 4) USING "rbfRentUsdM2Month"::numeric(18, 4),
+  ALTER COLUMN "rbwRentUsdM2Month" TYPE numeric(18, 4) USING "rbwRentUsdM2Month"::numeric(18, 4),
+  ALTER COLUMN "managementFeeUsd"  TYPE numeric(18, 4) USING "managementFeeUsd"::numeric(18, 4);
+
+-- IndustrialListing
+ALTER TABLE "IndustrialListing"
+  ALTER COLUMN "priceUsdM2"      TYPE numeric(18, 4) USING "priceUsdM2"::numeric(18, 4),
+  ALTER COLUMN "totalLeasePrice" TYPE numeric(18, 4) USING "totalLeasePrice"::numeric(18, 4),
+  ALTER COLUMN "managementFee"   TYPE numeric(18, 4) USING "managementFee"::numeric(18, 4);