miniflux instance: Support incremental fetching to avoid full sync

[newte88]

Currently, using the Miniflux instance triggers a full fetch on every refresh (resulting in multiple requests), which causes significant slowness. Is it possible to switch to incremental fetching?

[jocmp]

@newte88 yes! This is available in the latest nightly 2026.03.29-nightly if you want to check it out.

[newte88]

version:2026.04.1204
fetch unread entries triggers a full fetch on every refresh（resulting in multiple requests）, very slow on every refresh if there are many unread entries(such like 10000+)