Record the vision package in the architecture baseline

Why: Context assembly, ingest and runtime now depend on the vision package, and the dependency ratchet rejects edges that are not recorded.

Evidence: scripts/lint-boundaries.sh reports architecture ok with 88 edges.

Impact: The three new edges are the allowed image path. No other package gains a dependency.

Refs: .task/feature-four-model-vision.md
Co-authored-by: Cursor <cursoragent@cursor.com>

policy/architecture-baseline.json

@@ -27,7 +27,9 @@
 "backend/app backend/tools",
 "backend/app backend/workflow",
 "backend/cardsvc backend/store",
+"backend/ctxasm backend/vision",
 "backend/hostapi backend/store",
+"backend/ingest backend/vision",
 "backend/pgbus backend/bus",
 "backend/pgbus backend/store",
 "backend/plugins backend/settings",
@@ -58,6 +60,7 @@
 "backend/runtime backend/quality",
 "backend/runtime backend/squadadapter",
 "backend/runtime backend/wfcompile",
+"backend/runtime backend/vision",
 "backend/runtime backend/workflow",
 "backend/server backend/cardsvc",
 "backend/server backend/cmdbus",