Notes on ADR-0010 the retry window the code documents

[johnnyt]

Appends one dated foot Note to ADR-0010 (a timer delivery may answer a snooze). Refs: sob-xgz.

What the Note says

• The retry window. The Context says Oban's default backoff spreads the timer job's retries over "about twelve days". The StatifierOban.Timer.Delivery moduledoc section "A parked execution retries; it is never discarded" now gives the range, twelve to thirteen and a half days, and the Note states it with the moduledoc's arithmetic; "about twelve days" is the no-jitter floor.
• The code landed at proposed. The Context's last paragraph and the last Consequences bullet say the code follows the record once it is accepted. The operator ruled on 2026-09-28 that the code ships while the record is at proposed; it landed at 05d461f and is not yet in a published version. The Note records that and that the record stays proposed until that code ships, then flips. It does not reword either sentence.

The record stays at proposed. Additions only: git diff origin/main -- docs/adr/ shows zero removed lines.

Direction check (in-turn review, tier gate)

Each claim was read on main at 05d461f by anchor. The range and the sum ("15 + 2^n seconds plus a random 0-10% jitter", "about 12.1 days with no jitter and about 13.4 with the most") match the StatifierOban.Timer.Delivery moduledoc section named above and the README's "Delivering timers to a durable execution"; the arithmetic checks against the locked Oban 2.23.1 (Oban.Worker.backoff/1: Oban.Backoff.exponential/2 with min_pad: 15, then Oban.Backoff.jitter/2 in :inc mode with the default 0.1 multiplier; Oban.Job's default max_attempts of 20), and StatifierOban.Timer.Worker sets no max_attempts. The quoted record phrases match the Context's last paragraph and the last Consequences bullet word for word. The snooze arm is in c:StatifierOban.Timer.Delivery.deliver/2 and t:StatifierOban.Timer.Delivery.snooze/0, the clause in StatifierOban.Timer.Worker.perform/1; mix.exs reads @version "0.16.0" and the change's fragment is changelog.d/sob-46l.md, so the code is unpublished. The Note decides nothing and changes no Status line.

Gate

Docs only: the branch touches no gated path (gate.build_paths is lib/, test/, config/, mix.exs, mix.lock), so there is no gate to run. No changelog fragment: changelog.d/README.md excludes ADRs.