Increase Tracearr RAM; derive APP_VERSION

Bump default var_ram from 2048 to 4096 to allocate more memory for Tracearr. Replace reading /root/.tracearr with deriving APP_VERSION from CHECK_UPDATE_RELEASE (stripping a leading 'v') in the .env update, using a safer sed pattern.

CHANGELOG.md

@@ -431,7 +431,6 @@ Exercise vigilance regarding copycat or coat-tailing sites that seek to exploit
 
   - #### 🐞 Bug Fixes
 
-    - Increase Tracearr RAM; derive APP_VERSION [@MickLesk](https://github.com/MickLesk) ([#13087](https://github.com/community-scripts/ProxmoxVE/pull/13087))
     - ProjectSend: Update application access URL [@tremor021](https://github.com/tremor021) ([#13078](https://github.com/community-scripts/ProxmoxVE/pull/13078))
     - Dispatcharr: use npm install --no-audit --progress=false [@MickLesk](https://github.com/MickLesk) ([#13074](https://github.com/community-scripts/ProxmoxVE/pull/13074))
     - core: reorder hwaccel setup and adjust GPU group usermod [@MickLesk](https://github.com/MickLesk) ([#13072](https://github.com/community-scripts/ProxmoxVE/pull/13072))

misc/tools.func

@@ -5353,7 +5353,24 @@ function setup_java() {
 
   # Get currently installed version
   local INSTALLED_VERSION=""
-  INSTALLED_VERSION=$(dpkg-query -W -f '${Package}\n' 2>/dev/null | grep -oP '^temurin-\K[0-9]+(?=-jdk$)' | head -n1 || echo "")
+  if dpkg -l | grep -q "temurin-.*-jdk" 2>/dev/null; then
+    INSTALLED_VERSION=$(dpkg -l 2>/dev/null | awk '/temurin-.*-jdk/{print $2}' | grep -oP 'temurin-\K[0-9]+' | head -n1 || echo "")
+  fi
+
+  # Validate INSTALLED_VERSION is not empty if JDK package found
+  local JDK_COUNT=0
+  JDK_COUNT=$(dpkg -l 2>/dev/null | grep -c "temurin-.*-jdk" || true)
+  if [[ -z "$INSTALLED_VERSION" && "${JDK_COUNT:-0}" -gt 0 ]]; then
+    msg_warn "Found Temurin JDK but cannot determine version - attempting reinstall"
+    # Try to get actual package name for purge
+    local OLD_PACKAGE
+    OLD_PACKAGE=$(dpkg -l 2>/dev/null | awk '/temurin-.*-jdk/{print $2}' | head -n1 || echo "")
+    if [[ -n "$OLD_PACKAGE" ]]; then
+      msg_info "Removing existing package: $OLD_PACKAGE"
+      $STD apt purge -y "$OLD_PACKAGE" || true
+    fi
+    INSTALLED_VERSION="" # Reset to trigger fresh install
+  fi
 
   # Scenario 1: Already at correct version
   if [[ "$INSTALLED_VERSION" == "$JAVA_VERSION" ]]; then