Meteor 3.5.2: Rspack reliability, Cordova Android 15, and DDP connection fixes

Meteor 3.5 introduced MongoDB Change Streams, DDP session resumption, pluggable transports, and Node.js 24. Meteor 3.5.1 then strengthened Meteor runtime, Rspack and reconnection behavior. Meteor 3.5.2 continues that reliability work by refining Rspack builds, updating the Cordova Android toolchain, strengthening runtime defaults, and addressing community reports and reproductions.