purpur: silence advancement announcements

- purpur.yml: broadcasts.advancement.only-broadcast-to-affected-player
  false -> true. Player still sees own advancement, no global chat spam.
- ProAntiTab storage.yml: add gamerule/execute to global allow-list
  (vanilla gamerule still blocked by Brigadier even from datapacks —
  switched to Purpur broadcast option as workaround).
- ProAntiTab config.yml: auto-lowercase-commands disabled (was
  toggled while debugging gamerule failure; harmless either way).

Synced from /opt/docker/minecraft live, applied via purpur reload.

live-server/plugins/ProAntiTab/config.yml

@@ -158,7 +158,7 @@ block-namespace-commands:
 # Auto lowercase all commands when being executed,
 # such that something like /PAY turns into /pay.
 auto-lowercase-commands:
-  enabled: true
+  enabled: false
 
 # Patches a small exploit which causes the server to lag.
 # Due to the fact that PAT interacts directly with Tab-Completions and their packets,

live-server/plugins/ProAntiTab/storage.yml

@@ -2,6 +2,17 @@ global:
   commands:
     - login
     - register
+    - gamerule
+    - gamerule announceAdvancements
+    - gamerule announceAdvancements false
+    - gamerule keepInventory
+    - execute
+    - execute in
+    - execute in minecraft:overworld
+    - execute in minecraft:overworld run
+    - execute in minecraft:overworld run gamerule
+    - execute in minecraft:overworld run gamerule announceAdvancements
+    - execute in minecraft:overworld run gamerule announceAdvancements false
 
 groups:
   default:
@@ -9,7 +20,6 @@ groups:
     commands:
       - login
       - register
-#      - discord
       - help
       - rules
       - sethome

live-server/purpur.yml

@@ -171,7 +171,7 @@ settings:
     suppress-library-loader: false
   broadcasts:
     advancement:
-      only-broadcast-to-affected-player: false
+      only-broadcast-to-affected-player: true
     death:
       only-broadcast-to-affected-player: false
   server-mod-name: Purpur