fix(battle-node): MsgEnvelope rejects reserved Body keys + complete ReceiveNodeResultCode

ToJson now throws ArgumentException when a Body key collides with a reserved
envelope field (uri/viewerId/uuid/bid/try/cat/pubSeq/playSeq); FromJson reuses
the same shared ReservedEnvelopeKeys HashSet. ReceiveNodeResultCode expanded
from 9 to 31 codes to mirror the full enums.md catalog. Two regression tests
added for the collision guard and PascalCase uri serialization.

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

SVSim.BattleNode/Protocol/ReceiveNodeResultCode.cs

@@ -1,6 +1,10 @@
 namespace SVSim.BattleNode.Protocol;
 
-/// <summary>The "resultCode" field on synchronize pushes. 1=Success, else error.</summary>
+/// <summary>
+/// The "resultCode" field on synchronize pushes. 1 = Success, else error.
+/// Mirrors the full catalog from docs/api-spec/in-battle/enums.md, including
+/// source typos in the original spec (RoomBattleReadeError, RoomTornament*).
+/// </summary>
 public enum ReceiveNodeResultCode
 {
     None = 0,
@@ -8,9 +12,30 @@ public enum ReceiveNodeResultCode
     Different_UUID = 30001,
     RedisReplyError = 30002,
     UnexistUserinfoError = 30003,
+    RoomStatusInfoError = 30101,
+    RoomCreateError = 30102,
+    RoomEntryError = 30103,
+    RoomKickError = 30104,
+    RoomLeaveError = 30105,
+    RoomReleaseError = 30106,
+    RoomForceReleaseError = 30107,
+    RoomReenterError = 30108,
+    RoomBattleReadeError = 30109,         // source typo per spec, preserved
+    RoomTournamentDeckError = 30110,
+    RoomTournamentError = 30111,
+    RoomSetupLock = 30112,
     MatchingTimeOut = 30201,
     UnmatchedError = 30211,
     CurrentBattleError = 30212,
     UnexpectedPhaseError = 30213,
-    // Other codes from spec/enums.md added as needed; v1 only triggers the four above.
+    WatchError = 30302,
+    SwapTimeoutError = 31001,
+    FoundRemovedUserErrorSelf = 32101,
+    FoundRemovedUserErrorOppo = 32102,
+    FoundRemovedUserErrorWatcher = 32103,
+    RoomTimeEndError = 32104,
+    WatcherInRemovedOwnerRoomError = 32105,
+    RoomTornamentOwnTimeEndError = 32106,   // source typo per spec, preserved
+    RoomTornamentOppoTimeEndError = 32107,  // source typo per spec, preserved
+    BattleFinishTimeEnd = 32108,
 }