fix: upsert coder_app resources in case they are persistent (#18509)

coderd/agentapi/subagent.go

@@ -12,12 +12,13 @@ import (
 	"golang.org/x/xerrors"
 
 	"cdr.dev/slog"
+	"github.com/coder/quartz"
+
 	agentproto "github.com/coder/coder/v2/agent/proto"
 	"github.com/coder/coder/v2/coderd/database"
 	"github.com/coder/coder/v2/coderd/database/dbauthz"
 	"github.com/coder/coder/v2/codersdk"
 	"github.com/coder/coder/v2/provisioner"
-	"github.com/coder/quartz"
 )
 
 type SubAgentAPI struct {
@@ -164,8 +165,8 @@ func (a *SubAgentAPI) CreateSubAgent(ctx context.Context, req *agentproto.Create
 				}
 			}
 
-			_, err := a.Database.InsertWorkspaceApp(ctx, database.InsertWorkspaceAppParams{
-				ID:          uuid.New(),
+			_, err := a.Database.UpsertWorkspaceApp(ctx, database.UpsertWorkspaceAppParams{
+				ID:          uuid.New(), // NOTE: we may need to maintain the app's ID here for stability, but for now we'll leave this as-is.
 				CreatedAt:   createdAt,
 				AgentID:     subAgent.ID,
 				Slug:        app.Slug,