settings live in one registry, and the net drain starts to peel

- the CVars are one engine-side table that outlives every interface reload: a change fires its observer, the eight latched rows wait for RestartGx, and /console gains set, cvar_reset, cvar_default, cvarlist and help (2303)
- every push into the interface runs in one feed phase after the net drain and before the tick, held by a structural test on the built schedule (2304)
- subsystems own their packet handlers, dispatched in packet order; the auction house is the first family out of the 273-arm drain (2305)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

Cargo.lock

@@ -624,6 +624,7 @@ dependencies = [
  "num-bigint",
  "rand 0.8.6",
  "sha1",
+ "strum",
 ]
 
 [[package]]
@@ -6138,6 +6139,28 @@ version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
+[[package]]
+name = "strum"
+version = "0.26.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8fec0f0aef304996cf250b31b5a10dee7980c85da9d759361292b8bca5a18f06"
+dependencies = [
+ "strum_macros",
+]
+
+[[package]]
+name = "strum_macros"
+version = "0.26.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c6bee85a5a24955dc440386795aa378cd9cf82acd5f764469152d2270e581be"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "rustversion",
+ "syn",
+]
+
 [[package]]
 name = "svg_fmt"
 version = "0.4.5"