refactor(api): split 3 oversized files to comply with 200 LOC convention

Extract shared logic from postgres-search.repository.ts (361→105),
prisma-agent.repository.ts (298→179), and prisma-avm.service.ts (224→143)
into focused helper modules. All existing tests (92/92) pass unchanged.

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

apps/api/src/modules/search/infrastructure/services/search-result-mapper.ts

@@ -0,0 +1,64 @@
+import { type ListingDocument } from '../../domain/repositories/search.repository';
+
+export interface RawListingRow {
+  listingId: string;
+  propertyId: string;
+  title: string;
+  description: string;
+  propertyType: string;
+  transactionType: string;
+  priceVND: bigint;
+  pricePerM2: number | null;
+  areaM2: number;
+  bedrooms: number | null;
+  bathrooms: number | null;
+  floors: number | null;
+  direction: string | null;
+  address: string;
+  ward: string;
+  district: string;
+  city: string;
+  lat: number | null;
+  lng: number | null;
+  agentId: string | null;
+  sellerId: string;
+  status: string;
+  publishedAt: Date | string | null;
+  viewCount: number;
+  saveCount: number;
+  projectName: string | null;
+  amenities: unknown;
+}
+
+/** Map a raw SQL row to the domain ListingDocument shape. */
+export function mapRowToListingDocument(row: RawListingRow): ListingDocument {
+  return {
+    id: row.listingId,
+    listingId: row.listingId,
+    propertyId: row.propertyId,
+    title: row.title,
+    description: row.description,
+    propertyType: row.propertyType,
+    transactionType: row.transactionType,
+    priceVND: Number(row.priceVND),
+    pricePerM2: row.pricePerM2 ? Number(row.pricePerM2) : null,
+    areaM2: Number(row.areaM2),
+    bedrooms: row.bedrooms,
+    bathrooms: row.bathrooms,
+    floors: row.floors,
+    direction: row.direction,
+    address: row.address,
+    ward: row.ward,
+    district: row.district,
+    city: row.city,
+    location: [row.lat ?? 0, row.lng ?? 0] as [number, number],
+    agentId: row.agentId,
+    sellerId: row.sellerId,
+    status: row.status,
+    publishedAt: row.publishedAt ? Math.floor(new Date(row.publishedAt).getTime() / 1000) : 0,
+    viewCount: row.viewCount ?? 0,
+    saveCount: row.saveCount ?? 0,
+    projectName: row.projectName,
+    amenities: Array.isArray(row.amenities) ? (row.amenities as string[]) : [],
+  };
+}