feat: add pricing quality controls

Add robust outlier detection, stale valuation metadata, and audited seller-scoped market-value overrides with migration and tests.

apps/api/src/modules/pricing/routes/admin-pricing-routes.js

@@ -1,5 +1,5 @@
 import { toAdminMarketValuationDto, toAdminPricingObservationDto } from '@pokemon-inventory/contracts/pricing';
-import { createPricingObservationSchema } from '@pokemon-inventory/validation/pricing';
+import { createMarketValueOverrideSchema, createPricingObservationSchema } from '@pokemon-inventory/validation/pricing';
 
 import { createApplicationError } from '../../../shared/errors/application-error.js';
 
@@ -40,4 +40,17 @@ export async function registerAdminPricingRoutes(app, options) {
     const valuation = await pricingService.calculate({ sellerId: request.admin.sellerId, inventoryItemId: request.params.id });
     return reply.code(200).send({ data: toAdminMarketValuationDto(valuation) });
   });
+
+  app.post('/inventory/:id/valuation/override', async (request, reply) => {
+    await authorizeUnsafeRequest?.(request.cookies[sessionCookieName], request.headers['x-csrf-token']);
+    const result = createMarketValueOverrideSchema.safeParse(request.body);
+    if (!result.success) return validationError(reply, result);
+    const override = await pricingService.override({
+      ...result.data,
+      inventoryItemId: request.params.id,
+      sellerId: request.admin.sellerId,
+      actorUserId: request.admin.userId,
+    });
+    return reply.code(201).send({ data: override });
+  });
 }