chore(ci): run the lock bump daily instead of weekly

Move bump.yml's schedule from Mondays to every day (temporarily 17:39
UTC to trigger a run shortly). Sync the ROADMAP cadence note + shipped
log to match.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/ROADMAP.md

@@ -1840,8 +1840,9 @@ Design/decision records and a running log of shipped work (items marked
   builds `system.build.toplevel`, and on green lands on `main` — which nobody
   tracks, so a bad bump costs a debug session, not a user outage; `v1` stays
   the manual on-hardware gate (it only ever fast-forwards, never force-pushed,
-  or a user's locked rev can vanish from history). **Cadence weekly**
-  (release-26.05 doesn't move fast; nightly is just churn), and `nix flake
+  or a user's locked rev can vanish from history). **Cadence daily**
+  (2026-07-20; was weekly — release-26.05 doesn't move fast, but daily
+  shrinks security-patch latency and a no-op bump is cheap), and `nix flake
   update` stays *within* the pinned release branches — no surprise major bump
   (a 26.11 jump is a deliberate `v2`, hand-edited in flake.nix). Side benefit:
   shrinks the security-patch latency the single-input model otherwise imposes
@@ -1849,8 +1850,9 @@ Design/decision records and a running log of shipped work (items marked
   already eval/build/VM-tested and one hardware promotion away from `v1` —
   worth fast-laning lock-only/security bumps ahead of feature batches.
   **Shipped since:** `.gitea/workflows/check.yml` (eval tier on every main
-  push) and `bump.yml` (Monday 05:17 UTC scheduled lock bump, eval + V1
-  build gate, auto-lands on green — first landing 8fded63, 2026-07-06).
+  push) and `bump.yml` (daily 17:39 UTC scheduled lock bump, eval + V1
+  build gate, auto-lands on green — first landing 8fded63, 2026-07-06;
+  cadence weekly→daily 2026-07-20).
   2026-07-12: both gates moved from one big `nix flake check --no-build`
   (~6.0 GB peak RSS — OOM'd the 4 GB VPS, then could never fit the
   runner's 2 GB container cap) to `tools/ci-eval.sh`, one output per nix