fix(context): sync to the estate canonical context-sync.sh (ADR-0019)

Caught by the new estate-wide context-sync-drift gate (infra, ADR-0019).
This repo's copy had diverged from the canonical established in dma-cli/
infra -- synced to it, dead Cursor/Aider artifacts removed (2026-09-01
harness decision), Taskfile's drift assertion narrowed to match, adapters
regenerated against the current canonical AGENT.md.

Changed:
D  .aider.conf.yml
D  .aider.conventions.md
M  .context/system-prompt.txt
D  .cursorrules
M  AGENTS.md
M  CLAUDE.md
M  Taskfile.yml
M  scripts/context-sync.sh

Refs: ADR-0019 (infra)

CLAUDE.md

@@ -54,9 +54,16 @@ assessor-loop ledger) → `06 PR → CI` (go test/vet/lint/govulncheck + **var-g
 
 This repo is built *through* the workflow it depicts. It is `dispatch-allow`-enabled, and its
 own build increments are governed by a **var-go Oath** embedded in their spec issues (see the
-Stage-03 tracking issue). Bootstrapping honesty (per swedsl honest-stub discipline): the Oath is
-**defined** but `cmd/vargo-gate` is **not yet wired** into this repo's CI — until it is, the Oath
-is advisory here. Wiring it is a first tracked task; disclosed in code, this doc, and CI config.
+Stage-03 tracking issue). `cmd/vargo-gate` is wired into `.gitea/workflows/cd.yml`'s `oath` job —
+on every pull_request it fetches the linked issue's oath and gates cad-atlas's **own real
+candidate** (`oathcandidate/`, #8): it parses the committed `.gitea/workflows/cd.yml` and checks
+the `oath` job actually exists and invokes `cmd/vargo-gate`, then posts the `var-go/oath` commit
+status. This is a real check (TDD'd: passes on the real file, fails closed on a fixture missing
+the job), not swedsl's toy self-test stub — swedsl#35 (import path) and swedsl#38 (real-candidate
+subprocess gating) unblocked it. **Required by branch protection on `main`** (#8, closed
+2026-07-20), confirmed holding on a real PR. Direct pushes remain allowlisted for `mathias` per
+this repo's TBD convention. Disclosed in the CI config comment, this doc, and
+`docs/INCEPTION-OATH.md`.
 
 ## Brain references (source of truth — `brain_get <path>`)