chore(template): clean-slate template snapshot from bb4a0c7

Curated, product-agnostic snapshot of the post-story-04 tree: demo
content deleted, auth-only reference feature, web-next shell, all gates
green. Product-specific docs, ADRs 027-029, PRDs/epics/archive, editor
library traces, and product naming are curated out; generic template
repairs (coverage provider devDeps, root test:coverage script, live
lint fixes, root-only release-please) are kept. See TEMPLATE.md for
provenance, curation list, and usage.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016j8z4VHjedXDTjEDNg7qHK

compliance/retention-policy.yml

@@ -0,0 +1,11 @@
+# compliance/retention-policy.yml — Collection retention schedules
+# Generated by scripts/compliance/emit-retention-policy.mjs — do not edit manually.
+# Run `pnpm compliance:retention-policy` to regenerate.
+collections:
+  users:
+    postDeletion:
+      action: hard-delete
+      duration: P30D
+      trigger: after-deletion
+    purgeSchedule: daily
+    slug: users