Add invitingOrganizations field on viewer

Expose viewer.invitingOrganizations: [Organization!]! returning the
organizations that have a live pending invitation directed at the
current identity (accepted_at IS NULL AND expires_at > NOW()). The
list is rendered under a "Pending invitations" section on the
memberships page and in the organization selector dropdown, so a user
already signed in with an existing identity can see which
organizations have invited them without having to dig through their
inbox.

The new field is gated by iam:invitation:list against the viewer's
own identity, so it does not loosen authorization on Organization
elsewhere. E2E coverage validates the live-pending case, the
no-invitation and post-accept cases, and a multi-org scenario.

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

pkg/server/api/connect/v1/graphql/identity.graphql

@@ -30,6 +30,10 @@ type Identity implements Node {
     before: CursorKey
   ): PersonalAPIKeyConnection @goField(forceResolver: true)
 
+  invitingOrganizations: [Organization!]!
+    @goField(forceResolver: true)
+    @session(required: PRESENT)
+
   ssoLoginURL: String
     @goField(forceResolver: true)
     @session(required: PRESENT)

pkg/server/api/connect/v1/identity_resolvers.go

@@ -130,6 +130,26 @@ func (r *identityResolver) PersonalAPIKeys(ctx context.Context, obj *types.Ident
 	return types.NewPersonalAPIKeyConnection(page, r, obj.ID), nil
 }
 
+// InvitingOrganizations is the resolver for the invitingOrganizations field.
+func (r *identityResolver) InvitingOrganizations(ctx context.Context, obj *types.Identity) ([]*types.Organization, error) {
+	if _, err := r.authorize(ctx, obj.ID, iam.ActionInvitationList, authz.WithSkipAssumptionCheck()); err != nil {
+		return nil, err
+	}
+
+	organizations, err := r.iam.AccountService.ListInvitingOrganizations(ctx, obj.ID)
+	if err != nil {
+		r.logger.ErrorCtx(ctx, "cannot list inviting organizations", log.Error(err))
+		return nil, gqlutils.Internal(ctx)
+	}
+
+	result := make([]*types.Organization, len(organizations))
+	for i, organization := range organizations {
+		result[i] = types.NewOrganization(organization)
+	}
+
+	return result, nil
+}
+
 // SsoLoginURL is the resolver for the ssoLoginURL field.
 func (r *identityResolver) SsoLoginURL(ctx context.Context, obj *types.Identity) (*string, error) {
 	if _, err := r.authorize(ctx, obj.ID, iam.ActionIdentityGet); err != nil {