🐛 fix(entrypoint): use POSIX-compliant signal names

- Updates the trap command to use 'TERM/INT' instead of 'SIGTERM/SIGINT'. The 'SIG' prefix is undefined in POSIX sh (ShellCheck SC3048), which could prevent graceful shutdown in environments using dash/ash.

.github/workflows/validate.yml

@@ -238,7 +238,7 @@ jobs:
           done
           if [ -d "docs" ]; then
             echo "📁 Checking docs directory..."
-            for doc in DEPLOYMENT.md BACKUP.md PERFORMANCE.md LEGAL.md MONITORING.md TOOLS.md; do
+            for doc in ARCHITECTURE.md BACKUP.md CONTROL-PORT.md DEPLOYMENT.md FAQ.md LEGAL.md LOCAL-TESTING.md MIGRATION-V1.1.X.md MIGRATION.md MONITORING.md MULTI-MODE.md PERFORMANCE.md TOOLS.md TROUBLESHOOTING-BRIDGE-MIGRATION.md; do
               if [ -f "docs/$doc" ]; then
                 echo "✅ docs/$doc exists"
               else

docker-entrypoint.sh

@@ -25,7 +25,7 @@ success() { printf "✅ %s\n" "$1"; }
 warn() { printf "🛑 %s\n" "$1"; }
 die() { printf "🛑 ERROR: %s\n" "$1"; exit 1; }
 
-trap 'cleanup_and_exit' SIGTERM SIGINT
+trap 'cleanup_and_exit' TERM INT
 
 cleanup_and_exit() {
   log ""