feat(inquiries): list/get/triage/convert service + API routes (find-or-create client)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/app/api/v1/inquiries/route.ts

@@ -0,0 +1,33 @@
+import { NextResponse } from 'next/server';
+
+import { withAuth, withPermission } from '@/lib/api/helpers';
+import { parseQuery } from '@/lib/api/route-helpers';
+import { errorResponse } from '@/lib/errors';
+import { listInquiries } from '@/lib/services/inquiries.service';
+import { listInquiriesSchema } from '@/lib/validators/inquiries';
+
+export const GET = withAuth(
+  withPermission('inquiries', 'view', async (req, ctx) => {
+    try {
+      const query = parseQuery(req, listInquiriesSchema);
+      const result = await listInquiries(ctx.portId, query);
+
+      const { page, limit } = query;
+      const totalPages = Math.ceil(result.total / limit);
+
+      return NextResponse.json({
+        data: result.data,
+        pagination: {
+          page,
+          pageSize: limit,
+          total: result.total,
+          totalPages,
+          hasNextPage: page < totalPages,
+          hasPreviousPage: page > 1,
+        },
+      });
+    } catch (error) {
+      return errorResponse(error);
+    }
+  }),
+);