fix: create project directory before logging

- Fix 'No such file or directory' error on first run
- Create /opt/proxy-core directory before attempting to write logs
- Affects both install-advanced.sh and install-advanced-v2.sh

Co-Authored-By: Claude Sonnet 4 <noreply@anthropic.com>

install-advanced-v2.sh

@@ -25,6 +25,9 @@ CYAN='\033[0;36m'
 GRAY='\033[0;90m'
 NC='\033[0m'
 
+# Create project directory first
+mkdir -p "$PROJECT_DIR"
+
 # Logging
 LOGFILE="${PROJECT_DIR}/installer.log"
 

install-advanced.sh

@@ -23,6 +23,9 @@ CYAN='\033[0;36m'
 GRAY='\033[0;90m'
 NC='\033[0m'
 
+# Create project directory first
+mkdir -p "$PROJECT_DIR"
+
 # Logging
 LOGFILE="${PROJECT_DIR}/installer.log"