chore: update golang to 1.24.1 (#17035)

- Update go.mod to use Go 1.24.1
- Update GitHub Actions setup-go action to use Go 1.24.1
- Fix linting issues with golangci-lint by:
  - Updating to golangci-lint v1.57.1 (more compatible with Go 1.24.1)

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

---------

Co-authored-by: Claude <claude@anthropic.com>

coderd/workspaceapps/proxy.go

@@ -45,7 +45,7 @@ const (
 	// login page.
 	// It is important that this URL can never match a valid app hostname.
 	//
-	// DEPRECATED: we no longer use this, but we still redirect from it to the
+	// Deprecated: we no longer use this, but we still redirect from it to the
 	// main login page.
 	appLogoutHostname = "coder-logout"
 )
@@ -693,6 +693,7 @@ func (s *Server) workspaceAgentPTY(rw http.ResponseWriter, r *http.Request) {
 	}
 	defer release()
 	log.Debug(ctx, "dialed workspace agent")
+	// #nosec G115 - Safe conversion for terminal height/width which are expected to be within uint16 range (0-65535)
 	ptNetConn, err := agentConn.ReconnectingPTY(ctx, reconnect, uint16(height), uint16(width), r.URL.Query().Get("command"), func(arp *workspacesdk.AgentReconnectingPTYInit) {
 		arp.Container = container
 		arp.ContainerUser = containerUser