refactor(media)!: delete media demo feature

Veect retrofit (ADR-027): third slice of the demo-content removal.
Deletes packages/media whole and prunes every composition edge in one
commit: core-api router mount + dep, core-cms collection composition +
dep + regenerated Payload types, web-next bindAll (prod + dev-seed) +
tests + Tailwind source + transpilePackages + dep, cms/core-cms/web-next
payload config test assertions, tsconfig paths, anchor-guard + generator
e2e feature lists, compliance data-map + retention-policy regeneration,
lockfile prune, and feature-list doc entries (CLAUDE.md, AGENTS.md,
glossary, app/feature AGENTS.md).

Media was the uploads feature: the marketing-pages pages.hero.image and
navigation header.logo upload fields (relationTo: "media") are removed
from those collections in this slice — Payload config sanitization
rejects a relationship to a missing collection. Both features' domain
entities keep their optional imageId/logoId fields; their repositories
already tolerate the fields being absent. Both features are deleted in
later slices.

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

packages/core-cms/src/payload.config.ts

@@ -5,7 +5,6 @@ import path from "node:path";
 import { fileURLToPath } from "node:url";
 
 import { users } from "@repo/auth/cms";
-import { media } from "@repo/media/cms";
 import { pages, siteSettings } from "@repo/marketing-pages/cms";
 import { header } from "@repo/navigation/cms";
 
@@ -14,7 +13,7 @@ const dirname = path.dirname(filename);
 
 export default buildConfig({
   editor: lexicalEditor(),
-  collections: [users, pages, media],
+  collections: [users, pages],
   globals: [siteSettings, header],
   secret: process.env.PAYLOAD_SECRET || "default-secret-change-me",
   db: postgresAdapter({