A repository's home answers under 50 ms on the server: `now` and `following` under 5 ms each for trevato/forge #6184

Measured 2026-10-26: /trevato/forge reports app;dur=87, with now;dur=22.3, following;dur=18.6, shipped;dur=11.5 and panels;dur=10.7.

Done when:

• [ ] The now and following phases read in batches (no per-row query). Each runs under 5 ms on a fixture with 400 open issues, 40 open pulls and 5 active runs, and a test asserts it.
• [ ] What the two sections show is unchanged: the existing repo home tests pass.

Files: the repo home page in src/web/pages/ and the modules behind now and following, a test. Risk: following depends on the viewer, so do not cache across viewers.