feat: Working on mocks and mock storage.

Sources/DatabaseClientLive/VendorBranches.swift

@@ -16,13 +16,11 @@ public extension DatabaseClient.VendorBranches {
       }
       try await model.delete(on: db)
     } fetchAll: { request in
-      var query = VendorBranchModel.query(on: db)
+      let query = VendorBranchModel.query(on: db)
 
       switch request {
       case .all:
         break
-      case .withVendor:
-        query = query.with(\.$vendor)
       case let .for(vendorID: vendorID):
         let branches = try await VendorModel.query(on: db)
           .filter(\.$id == vendorID)