docs(examples): add the CMS proof-of-concept dogfooding artifact

A WordPress-inspired CMS whose entire backend is PiCloud Rhai scripts
deployed with pic apply, plus a SvelteKit frontend. Built to dogfood the
project tool, CLI, and SDK; exercises docs/kv/files/users, docs+queue+cron
+pubsub triggers, the transactional-outbox notification chain, a docs
before-interceptor, set_if CAS, SSE, per-app CORS, env overlays, and a
durable Workflow (validate -> enrich || seo -> publish -> finalize) started
with workflow::start and polled with workflow::run_status, visualized live
with Svelte Flow.

FINDINGS.md / SECURITY.md capture every gap, surprise, and security issue
found (each tagged [PiCloud] vs [CMS]); the platform fixes for the
actionable ones ship in the preceding commit.

Also folds in the read-only `pic` allowlist entries added to
.claude/settings.json during the session (fewer-permission-prompts).

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

examples/cms-poc/scripts/posts/posts_admin_list.rhai

@@ -0,0 +1,21 @@
+// GET /cms/admin/posts — list posts for the dashboard (author+).
+// Admin sees all; an author sees only their own.
+import "auth" as auth;
+import "util" as util;
+let g = auth::guard(ctx, ["admin", "author"]);
+if !g.ok { return g.response; }
+let user = g.user;
+
+let posts = docs::collection("posts");
+let is_admin = users::has_role(user.id, "admin");
+let filter = #{ "$sort": #{ updated_at: -1 }, "$limit": 100 };
+if !is_admin { filter.author_id = user.id; }
+
+let rows = posts.find(filter);
+let out = [];
+for r in rows {
+    let p = util::shape_doc(r);
+    p.remove("body_md");
+    out.push(p);
+}
+#{ statusCode: 200, body: #{ posts: out } }