docs(armada): two logs claimed 027 — the CosmicFest one becomes 029

A parallel session in this shared checkout committed `027-the-instruments-were-the-
broken-part.md` at 00:05, but 027 was taken at 17:34 by `027-the-label-and-the-lens.md`
and 028 by `028-la-cale-and-the-empty-loop.md`. Renumbered to the next free slot;
content untouched, only the filename and the heading.

The captain's log is a sequence on purpose — it is the documentary's spine — so two
entries sharing a number is not cosmetic. Worth noting that a shared working tree makes
this collision structural rather than careless: neither session could see the other's
number until both had committed. A worktree per session avoids the `git add` race but
not this.

armada/tasks/027-the-instruments-were-the-broken-part.md → armada/tasks/029-the-instruments-were-the-broken-part.md

-# 027 — The instruments were the broken part
+# 029 — The instruments were the broken part
 
 **Landed 2026-08-21/22, the night before CosmicFest.** PLN opened with *"i dont see midi
 feedback visuel anymore on the LCXL fix this first plz"* and closed with *"are we ready to