test(simulation): sprint 10 — replay loading, content scaling, serialization v9, observer tests

#483: Replay loading in test-client — JSONL file loading, tick-scheduled
PlayerInput sending, 13 unit tests, 3 sample replay files.
#500: Content scaling test — baseline + extra NPC comparative, tick budget
assertion (D-026), determinism check across content packs.
#514: Serialization tests for protocol v9 — blocked_entities roundtrip,
backward compat (v5→v9, v8→v9), regenerated msgpack fixtures.
Observer perception tests for confrontation + walk-away mechanics.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tooling/test-client/Cargo.lock

@@ -556,6 +556,16 @@ dependencies = [
  "typeid",
 ]
 
+[[package]]
+name = "errno"
+version = "0.3.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
+dependencies = [
+ "libc",
+ "windows-sys",
+]
+
 [[package]]
 name = "event-listener"
 version = "5.4.1"
@@ -799,6 +809,12 @@ version = "0.2.180"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bcc35a38544a891a5f7c865aca548a982ccb3b8650a5b06d0fd33a10283c56fc"
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df1d3c3b53da64cf5760482273a98e575c651a67eec7f77df96b5b642de8f039"
+
 [[package]]
 name = "log"
 version = "0.4.29"
@@ -1067,6 +1083,19 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "rustix"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "146c9e247ccc180c1f61615433868c99f3de3ae256a30a43b49f67c2d9171f34"
+dependencies = [
+ "bitflags",
+ "errno",
+ "libc",
+ "linux-raw-sys",
+ "windows-sys",
+]
+
 [[package]]
 name = "rustversion"
 version = "1.0.22"
@@ -1143,7 +1172,7 @@ dependencies = [
 
 [[package]]
 name = "settled-reach-server"
-version = "0.1.0"
+version = "0.1.9"
 dependencies = [
  "bevy_app",
  "bevy_ecs",
@@ -1168,6 +1197,7 @@ dependencies = [
  "serde",
  "serde_json",
  "settled-reach-server",
+ "tempfile",
 ]
 
 [[package]]
@@ -1241,6 +1271,19 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "tempfile"
+version = "3.25.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0136791f7c95b1f6dd99f9cc786b91bb81c3800b639b3478e561ddb7be95e5f1"
+dependencies = [
+ "fastrand",
+ "getrandom 0.4.1",
+ "once_cell",
+ "rustix",
+ "windows-sys",
+]
+
 [[package]]
 name = "thiserror"
 version = "2.0.18"