refactor(cmdline)!: an app's entrypoint provides values its rows read

Replaces the patch round trip. An app's entrypoint resolves the command
line into a service, and the rows it configures read that service from
their own config — port: !!js ctx.get('webStartup')?.port ?? 3080 — so the
resolved value beats the value written beside it and nothing is written
back into a row or handed to the launcher.

A bundle names the entrypoint row in its manifest (dsh.bundle.entrypoint),
which is what lets the boot mount in two passes: entrypoints alone, then
the whole composition. That ordering is required, not cosmetic — a row's
config expressions are evaluated when the include applies the row, and a
strict ctx.get only answers for a service whose providing fiber is already
active.

What this removes: ctx.appPatches and the launcher-owned patch layer, the
disable/re-enable recycle and its in-flight-mount barrier, overrideConfig,
and the reload hazard they existed for. A live config edit now re-applies
the second pass against services that are still up, so a served port
survives by construction.

What it adds: ctx.appReady, because Loader settlement no longer means the
app is up — a row mounted in the second pass can observe a settled tree
while that pass is still running, or already rolling back. The web URL line
waits for it, so a boot that fails in the second pass announces nothing.

packages/bundle/web-app/package.json

@@ -33,7 +33,8 @@
   "license": "BSD-3-Clause",
   "dsh": {
     "bundle": {
-      "patch": "./cordis.patch.yml"
+      "patch": "./cordis.patch.yml",
+      "entrypoint": "web-startup"
     }
   },
   "dependencies": {