chore: Replace production paths with generic examples

Sanitized all production-specific paths:
- /u01/dba/restore_tmp → /mnt/storage/restore_tmp
- /u01/dba/dumps/ → /mnt/backups/

Changed in:
- cmd/restore.go: Help text and flag description
- internal/restore/safety.go: Error message tip
- README.md: All documentation examples
- bin/*: Rebuilt all platform binaries

This ensures no production environment paths are exposed in public code/docs.

README.md

@@ -332,7 +332,7 @@ Restore full cluster:
 
 ```bash
 # Use NFS mount or larger partition for extraction
-./dbbackup restore cluster cluster_backup.tar.gz --workdir /u01/dba/restore_tmp --confirm
+./dbbackup restore cluster cluster_backup.tar.gz --workdir /mnt/storage/restore_tmp --confirm
 ```
 
 This prevents "insufficient disk space" errors when the backup directory has space but the system root partition is small.
@@ -648,7 +648,7 @@ If your system disk (where PostgreSQL data resides) is small but you have large
 ```bash
 # Extract to alternative location with more space
 ./dbbackup restore cluster cluster_backup.tar.gz \
-  --workdir /u01/dba/restore_tmp \
+  --workdir /mnt/storage/restore_tmp \
   --confirm
 ```
 
@@ -785,7 +785,7 @@ sudo -u postgres ./dbbackup restore cluster cluster_backup.tar.gz \
 
 # Special case: Limited system disk space (use alternative extraction directory)
 sudo -u postgres ./dbbackup restore cluster cluster_backup.tar.gz \
-  --workdir /u01/dba/restore_tmp \
+  --workdir /mnt/storage/restore_tmp \
   --confirm
 ```
 

cmd/restore.go

@@ -138,7 +138,7 @@ Examples:
 	dbbackup restore cluster cluster_backup.tar.gz --jobs 4 --confirm
 
 	# Use alternative working directory (for VMs with small system disk)
-	dbbackup restore cluster cluster_backup.tar.gz --workdir /u01/dba/restore_tmp --confirm
+	dbbackup restore cluster cluster_backup.tar.gz --workdir /mnt/storage/restore_tmp --confirm
 `,
 	Args: cobra.ExactArgs(1),
 	RunE: runRestoreCluster,
@@ -233,7 +233,7 @@ func init() {
 	restoreClusterCmd.Flags().BoolVar(&restoreDryRun, "dry-run", false, "Show what would be done without executing")
 	restoreClusterCmd.Flags().BoolVar(&restoreForce, "force", false, "Skip safety checks and confirmations")
 	restoreClusterCmd.Flags().IntVar(&restoreJobs, "jobs", 0, "Number of parallel decompression jobs (0 = auto)")
-	restoreClusterCmd.Flags().StringVar(&restoreWorkdir, "workdir", "", "Working directory for extraction (use when system disk is small, e.g. /u01/dba/restore_tmp)")
+	restoreClusterCmd.Flags().StringVar(&restoreWorkdir, "workdir", "", "Working directory for extraction (use when system disk is small, e.g. /mnt/storage/restore_tmp)")
 	restoreClusterCmd.Flags().BoolVar(&restoreVerbose, "verbose", false, "Show detailed restore progress")
 	restoreClusterCmd.Flags().BoolVar(&restoreNoProgress, "no-progress", false, "Disable progress indicators")
 	restoreClusterCmd.Flags().StringVar(&restoreEncryptionKeyFile, "encryption-key-file", "", "Path to encryption key file (required for encrypted backups)")

internal/restore/safety.go

@@ -264,7 +264,7 @@ func (s *Safety) CheckDiskSpaceAt(archivePath string, checkDir string, multiplie
 			"  Available: %s\\n"+
 			"  Archive: %s\\n"+
 			"  Check location: %s\\n\\n"+
-			"Tip: Use --workdir to specify extraction directory with more space (e.g., --workdir /u01/dba/restore_tmp)",
+			"Tip: Use --workdir to specify extraction directory with more space (e.g., --workdir /mnt/storage/restore_tmp)",
 			usagePercent,
 			FormatBytes(requiredSpace),
 			FormatBytes(availableSpace),