Export environment variables in scripts to fix passphrase prompts

- Add 'set -a' and 'set +a' around 'source .env' in healthcheck.sh and restore.sh
- Ensures environment variables are exported to child processes (borg, borgmatic)
- Fixes issue where scripts would prompt for BORG_PASSPHRASE despite .env being loaded
- Update TODO.md: mark completed items, improve formatting

Scripts updated:
- scripts/healthcheck.sh: Export vars before calling borgmatic commands
- scripts/restore.sh: Export vars before calling borg commands

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

scripts/healthcheck.sh

@@ -13,11 +13,15 @@ YELLOW='\033[1;33m'
 BLUE='\033[0;34m'
 NC='\033[0m'
 
-# Charger les variables d'environnement
+# Charger et exporter les variables d'environnement
 if [ -f /etc/borgmatic/.env ]; then
+    set -a
     source /etc/borgmatic/.env
+    set +a
 elif [ -f .env ]; then
+    set -a
     source .env
+    set +a
 fi
 
 ERRORS=0

scripts/restore.sh

@@ -13,11 +13,15 @@ YELLOW='\033[1;33m'
 BLUE='\033[0;34m'
 NC='\033[0m'
 
-# Charger les variables d'environnement
+# Charger et exporter les variables d'environnement
 if [ -f /etc/borgmatic/.env ]; then
+    set -a
     source /etc/borgmatic/.env
+    set +a
 elif [ -f .env ]; then
+    set -a
     source .env
+    set +a
 else
     echo -e "${RED}❌ Fichier .env non trouvé${NC}"
     exit 1