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/interface.go

@@ -60,12 +60,13 @@ type BackupOptions struct {
 
 // RestoreOptions holds options for restore operations
 type RestoreOptions struct {
-	Parallel     int
-	Clean        bool
-	IfExists     bool
-	NoOwner      bool
-	NoPrivileges bool
+	Parallel          int
+	Clean             bool
+	IfExists          bool
+	NoOwner           bool
+	NoPrivileges      bool
 	SingleTransaction bool
+	Verbose           bool // Enable verbose output (caution: can cause OOM on large restores)
 }
 
 // SampleStrategy defines how to sample data