feat: contribute governed campaign reports

README.md

@@ -16,12 +16,17 @@ This repository owns:
 - campaign JSON schema, validation, message building, attachment resolution, ZIP handling, reports, queue/control services, and mock-send paths
 - WebUI package `@govoplan/campaign-webui`
 - route contributions for `/campaigns`, the integrated `/campaigns/queue` view,
-  `/campaigns/:campaignId/*`, `/reports`, and `/templates`
+  `/campaigns/reports`, `/campaigns/:campaignId/*`, and `/templates`
 
 Core owns the auth facade, RBAC/capability contracts, database/session
 primitives, CSRF/API helpers, shell layout, and route rendering. Tenancy is an
 optional platform module for tenant administration and tenant resolver behavior.
 Files and mail own their respective storage and transport capabilities.
+When the optional Reporting module is enabled, Campaign contributes its
+recipient-free aggregate delivery report through the versioned Core report
+provider contract. Reporting owns the global `/reports` route. Campaign keeps
+its module-local `/campaigns/reports` view and does not claim the global route
+when Reporting is absent.
 
 Generated EML is durable execution material, not a node-local runtime cache.
 Campaign stores it through Core's shared object-storage contract under opaque