restore: fix OOM caused by --verbose output accumulation

CRITICAL OOM FIX:
- pg_restore --verbose outputs MASSIVE text (gigabytes for large DBs)
- Previous fix accumulated ALL errors in allErrors slice causing OOM
- Now limit error capture to last 10 errors only
- Discard verbose progress output entirely to prevent memory buildup

CHANGES:
- Replace allErrors slice with lastError string + errorCount counter
- Only log first 10 errors to prevent memory exhaustion
- Make --verbose optional via RestoreOptions.Verbose flag
- Disable --verbose for cluster restores (prevent OOM)
- Keep --verbose for single DB restores (better diagnostics)

This resolves 'runtime: out of memory' panic during cluster restore.

internal/database/postgresql.go

@@ -378,8 +378,10 @@ func (p *PostgreSQL) BuildRestoreCommand(database, inputFile string, options Res
 	// Skip data restore if table creation fails (prevents duplicate data errors)
 	cmd = append(cmd, "--no-data-for-failed-tables")
 	
-	// Add verbose flag for better error reporting
-	cmd = append(cmd, "--verbose")
+	// Add verbose flag ONLY if requested (WARNING: can cause OOM on large cluster restores)
+	if options.Verbose {
+		cmd = append(cmd, "--verbose")
+	}
 	
 	// Database and input
 	cmd = append(cmd, "--dbname="+database)