fix(reports): stop the 'first N rows' option failing on large exports

The export path used one number for two different things: the format's hard
row cap, and the caller's explicit 'give me the first N rows'. Because
resolveExportCap() returned min(requested, formatCap) and runAll() then threw
when the result reached it, picking 'Records: First 100' in the export dialog
400'd on any report with more than 100 rows — the user asked to be truncated
and got an error instead.

Splits them: formatRowCap() is the hard, non-caller-controllable ceiling that
still throws when exceeded (a silently short file hides missing rows), while
resolveRowLimit() is the deliberate truncation and is honoured by slicing.
Verified against a 223-row dataset: limit=5 now returns 5 rows, and no limit
returns all 223.

apps/edr-freight-api/src/modules/reports/reports.controller.ts

@@ -12,9 +12,10 @@ import { FREIGHT_PERMS, reportPermissionKey } from '../../seed/freight-permissio
 import { UserTradeAccessService } from '../user-trade-access/user-trade-access.service';
 import {
   EXPORT_MIME,
+  formatRowCap,
   pickByKey,
-  resolveExportCap,
   resolveExportFormat,
+  resolveRowLimit,
 } from '../exports/export-request.util';
 import { TabularExportService } from '../exports/tabular-export.service';
 import { RawReportQuery, ReportRunnerService } from './report-runner.service';
@@ -101,10 +102,12 @@ export class ReportsController {
     const def = this.resolve(key, user);
     const directions = await this.userTradeAccessService.resolveAllowedDirections(user);
     const format = resolveExportFormat(query.format);
-    const cap = resolveExportCap(format, query.limit);
     const exportColumns = pickByKey(def.columns, query.fields);
 
-    const { items, kpis } = await this.runner.runAll(def, query, directions, cap);
+    const { items, kpis } = await this.runner.runAll(def, query, directions, {
+      cap: formatRowCap(format),
+      limit: resolveRowLimit(format, query.limit),
+    });
     const doc = {
       title: def.title,
       description: def.description,