Consolidate backup storage to single mongo-backup directory

- Unify all backup scripts to use ./mongo-backup/ directory
- Update db-backup--standalone.sh to store volume backups in mongo-backup/
- Update db-backup--swarm.sh to use mongo-backup as default directory
- Update db-restore-from-backup--swarm.sh to look in mongo-backup/
- Update all header comments and documentation to reflect new location
- Update .gitignore to ignore both backups/ and mongo-backup/
- Update README.md with consolidated backup directory paths

This simplifies backup management by having all backup types in one location.

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

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

db-restore-from-backup--swarm.sh

@@ -22,7 +22,7 @@ set -euo pipefail
 #
 # INPUT:
 #   - Requires backup filename as parameter
-#   - Looks for file in: ./backups/
+#   - Looks for file in: ./mongo-backup/
 #   - Optional: --pre-backup flag to create safety backup before restore
 #
 # USAGE:
@@ -72,10 +72,10 @@ if [ -z "${TIMESTAMP:-}" ]; then
   echo "  --do-pre-backup=false   Skip interactive prompt, no pre-restore backup"
   echo ""
   echo "Available backups:"
-  ls -1t backups/mongo-volume-backup-*.tar.gz 2>/dev/null | sed 's/.*mongo-volume-backup-\(.*\)\.tar\.gz/  \1/' || echo "  No backups found"
+  ls -1t mongo-backup/mongo-volume-backup-*.tar.gz 2>/dev/null | sed 's/.*mongo-volume-backup-\(.*\)\.tar\.gz/  \1/' || echo "  No backups found"
   exit 1
 fi
-BACKUP_DIR="${BACKUP_DIR:-backups}"
+BACKUP_DIR="${BACKUP_DIR:-mongo-backup}"
 BACKUP_FILE="$BACKUP_DIR/mongo-volume-backup-$TIMESTAMP.tar.gz"
 
 # Check if backup file exists