refactor(cmdline): trim the command-line seams to existing interfaces

The web runtime creates its dev-mode client-hmr row in the root tree
after Loader settlement with plain loader.create, deleting the vendored
Entry.enableRuntime state machine and dsh-cmdline's enableRow export.
Include declares the existing EntryGroup.key tree-carrier marker instead
of the EntryConfigResolver protocol (its own path stays literal; nothing
used a dynamic path). The launcher recognizes no app row: SIGTERM exits
0 on every surface, every boot watches its user patch layers, and the
headless runner exits through ctx.appExit, deleting ctx.headlessIo. Also
restores the vendor README rescope entry to the position the
rescope-vendor exact-edit anchor requires, fixing the master hygiene
regression.

docs/config-catalog.md

@@ -579,7 +579,7 @@ export interface Config {
 }
 ```
 
-Source: [`packages/bundle/headless/src/index.ts:29`](../packages/bundle/headless/src/index.ts)
+Source: [`packages/bundle/headless/src/index.ts:31`](../packages/bundle/headless/src/index.ts)
 
 ## `@deepseek-ai/dsh-hooks-claude`
 
@@ -2574,7 +2574,7 @@ export interface Config {
 export type WebMode = 'production' | 'development'
 ```
 
-Source: [`packages/bundle/web-app/src/index.ts:43`](../packages/bundle/web-app/src/index.ts)
+Source: [`packages/bundle/web-app/src/index.ts:42`](../packages/bundle/web-app/src/index.ts)
 
 ## `@deepseek-ai/dsh-web-fetch-local`