Backend: Customer module (list/search/detail) + working session auth + pnpm

Adds the unified Customer API against the migrated data:
- customers.service: list (search across name/email/phone/city/legacy id,
  business-line filter, pagination + per-row _count flags), detail (identity +
  legacyRefs + properties/services/trust + policies with installments/vehicles/
  drivers/beneficiaries/claims/docs + recent transactions + a per-domain/
  currency ledger summary), and stats.
- customers.controller: GET /customers, /customers/:id, /customers/stats,
  guarded by AuthenticatedGuard. Registered in AppModule.
- Fix LocalAuthGuard to call super.logIn so a session is actually established
  (login previously succeeded but persisted no session -> 403 afterwards).
- apps/api/scripts/seed-user.mjs: idempotent Argon2 admin seed.

Tooling: adopt pnpm as the package manager (machine npm is a pnpm shim that
ignores the workspaces field). Add pnpm-workspace.yaml (+ onlyBuiltDependencies
for argon2/prisma/nest native builds), switch the api's @jorgecuadros/database
dep to workspace:*, add @types/passport, track pnpm-lock.yaml, drop the stale
package-lock.json.

Verified end-to-end against the dev DB: login sets a session cookie; stats
returns 1682 customers / 526 both-lines / 45861 transactions; search + detail
return the full cross-line customer view (properties+services AND policies AND
a unified transaction statement).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/api/src/customers/customers.controller.ts

@@ -0,0 +1,31 @@
+import { Controller, Get, Param, Query, UseGuards } from "@nestjs/common";
+import { AuthenticatedGuard } from "../auth/authenticated.guard";
+import { CustomersService } from "./customers.service";
+
+@UseGuards(AuthenticatedGuard)
+@Controller("customers")
+export class CustomersController {
+  constructor(private readonly customers: CustomersService) {}
+
+  @Get("stats")
+  stats() {
+    return this.customers.stats();
+  }
+
+  @Get()
+  list(
+    @Query("query") query?: string,
+    @Query("page") page?: string,
+    @Query("pageSize") pageSize?: string,
+    @Query("line") line?: "utility" | "insurance" | "both",
+  ) {
+    const p = Math.max(1, Number(page) || 1);
+    const ps = Math.min(100, Math.max(1, Number(pageSize) || 25));
+    return this.customers.list({ query, page: p, pageSize: ps, line });
+  }
+
+  @Get(":id")
+  detail(@Param("id") id: string) {
+    return this.customers.detail(id);
+  }
+}