Jujutsu 0.44.0 stabilizes tag fetch and push and changes what jj git fetch does

Sources: primary, changelog, discussion
Summary: Jujutsu 0.44.0 stabilizes tag fetch and push. The first jj git fetch after upgrading re-fetches and starts tracking every tag. jj git push --all now pushes tags. jj file search changes its default output.
Why it matters: Three defaults move at once on paths that scripted jj workflows already call, so those workflows need review before the upgrade rather than after.