refactor(marketing-pages)!: delete marketing-pages demo feature

Veect retrofit (ADR-027): fourth slice of the demo-content removal.
Deletes packages/marketing-pages whole and prunes every composition
edge in one commit: core-api router mount + dep, core-cms
collection/global composition + dep + regenerated Payload types,
web-next bindAll (prod + dev-seed) + tests + about page + Tailwind
source + transpilePackages + dep, cms/core-cms payload config test
assertions, marketing-page e2e spec, tsconfig paths, fallow ignore
entry, 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).

Event teardown: marketing-pages was the sole consumer of
auth.user.signed-up (welcome-email handler + job). The handler, its
Payload tasks, and the bus subscription all lived inside the package's
own binders, so they die with it — no other package wires the
subscription. Auth's manifest `publishes` stays untouched: a publisher
with zero consumers is legal (pnpm conformance only fails on orphan
consumers, verified green). The app-level sign-up-welcome-email test
asserted the marketing-pages mailer stays empty without a bus; it is
deleted with the feature, and the now-unused test-only bind-state
helpers in web-next bind-production.ts go with it.

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

AGENTS.md

@@ -37,7 +37,6 @@ See `docs/guides/runbook.md` for the full workflow.
 | `@repo/core-cms`        | core-composition | Payload config aggregator — imports `@repo/<feature>/cms` only                                                                         |
 | `@repo/core-trpc`       | core-composition | Frontend tRPC client + framework-specific providers (Next.js, TanStack)                                                                |
 | `@repo/auth`            | feature          | Users collection + sign-in/up/out                                                                                                      |
-| `@repo/marketing-pages` | feature          | Pages collection + SiteSettings global                                                                                                 |
 | `@repo/navigation`      | feature          | Header global                                                                                                                          |
 | `@repo/core-eslint`     | tooling          | Shared ESLint 9 flat configs (base, next, react-internal, boundaries)                                                                  |
 | `@repo/core-typescript` | tooling          | Shared TypeScript base configs + Vitest base                                                                                           |
@@ -52,7 +51,7 @@ See `docs/guides/runbook.md` for the full workflow.
 - **app** (3 packages) — `apps/web-next`, `apps/cms`, `apps/storybook`
 - **core-composition** (3 packages) — `packages/core-api`, `core-cms`, `core-trpc`
 - **core** (1–2 packages) — `packages/core-shared`; `core-ui` is optional (scaffold with `pnpm turbo gen core-package ui`)
-- **feature** (3 packages) — `packages/auth`, `marketing-pages`, `navigation`
+- **feature** (2 packages) — `packages/auth`, `navigation`
 - **tooling** (3 packages) — `packages/core-eslint`, `core-typescript`, `core-testing`
 
 ### Allowed dependency directions
@@ -383,7 +382,6 @@ export async function bindAllProduction(): Promise<void> {
   };
 
   bindProductionAuth(ctx);
-  bindProductionMarketingPages(ctx);
   bindProductionNavigation(ctx);
 }
 
@@ -404,11 +402,11 @@ export async function bindAllDevSeed(): Promise<void> {
   };
 
   await bindDevSeedAuth(ctx);
-  // ... (same for marketing-pages, navigation)
+  // ... (same for navigation)
 }
 ```
 
-Actual function names: `bindProductionAuth`, `bindProductionMarketingPages`, `bindProductionNavigation`.
+Actual function names: `bindProductionAuth`, `bindProductionNavigation`.
 
 Each feature binder signature is `(ctx: BindProductionContext): void` for production and `(ctx: BindContext): Promise<void>` for dev-seed. Required ctx fields: `tracer`, `logger`. Production-only: `config`. Optional: `bus`, `queue`, `realtime`, `realtimeRegistry`.
 
@@ -574,6 +572,6 @@ Per-package documentation lives in each `AGENTS.md`:
 - `packages/core-shared/AGENTS.md`
 - `packages/core-api/AGENTS.md`, `core-cms/AGENTS.md`, `core-trpc/AGENTS.md`
 - `packages/core-ui/AGENTS.md` (optional — generated by `pnpm turbo gen core-package ui`; see `turbo/generators/templates/core-package/ui/AGENTS.md.hbs`)
-- `packages/auth/AGENTS.md`, `marketing-pages/AGENTS.md`, `navigation/AGENTS.md`
+- `packages/auth/AGENTS.md`, `navigation/AGENTS.md`
 - `packages/core-eslint/AGENTS.md`, `core-typescript/AGENTS.md`, `core-testing/AGENTS.md`
 - `apps/cms/AGENTS.md`, `web-next/AGENTS.md`, `storybook/AGENTS.md`