fix: add storage to pinned versions check and fix pgx v5.9 macaddr array decoding

- Add cloud.google.com/go/storage v1.59.2 to pinnedVersions in
  check_pinned_versions/main.go (the go.mod already had the PINNED comment
  but the checker map was missing the entry)
- Fix convertToStringArray to handle pgx v5.9 binary-encoded array elements:
  pgx v5.9 may decode macaddr[] columns as pgtype.Array[string] where each
  element is the 6-byte binary wire format instead of "XX:XX:XX:XX:XX:XX".
  Use ArrayCodec.ElementType to find the element OID, then attempt a
  binary→text re-scan; fall back to net.HardwareAddr for macaddr specifically.

Co-authored-by: Ilia Demianenko <ilidemi@users.noreply.github.com>

Author: github-actions[bot]

flow/cmd/check_pinned_versions/main.go

@@ -19,6 +19,7 @@ import (
 var pinnedVersions = map[string]string{
 	"cloud.google.com/go/bigquery":                    "v1.72.0",
 	"cloud.google.com/go/pubsub/v2":                   "v2.3.0",
+	"cloud.google.com/go/storage":                     "v1.59.2",
 	"github.com/aws/aws-sdk-go-v2/feature/s3/manager": "v1.21.0",
 	"google.golang.org/api":                           "v0.257.0",
 	"github.com/tikv/pd/client":                       "v0.0.0-20251229071808-6173d50c004c",

flow/connectors/postgres/qvalue_convert.go

@@ -339,6 +339,30 @@ func (c *PostgresConnector) convertToStringArray(kind types.QValueKind, oid uint
 	switch v := value.(type) {
 	case pgtype.Array[string]:
 		if v.Valid {
+			// pgx v5.9+ may return binary-encoded elements (e.g. macaddr as 6 raw bytes).
+			// Detect this by checking if the array type has a known element codec and
+			// attempting a binary→text re-scan for each non-empty element.
+			if t, ok := c.typeMap.TypeForOID(oid); ok {
+				if ac, ok := t.Codec.(*pgtype.ArrayCodec); ok && ac.ElementType != nil {
+					elemOID := ac.ElementType.OID
+					result := make([]string, len(v.Elements))
+					for i, elem := range v.Elements {
+						if elem == "" {
+							continue
+						}
+						var s string
+						if err := c.typeMap.Scan(elemOID, pgtype.BinaryFormatCode, []byte(elem), &s); err == nil {
+							result[i] = s
+						} else if elemOID == pgtype.MacaddrOID && len(elem) == 6 {
+							// Explicit fallback: decode macaddr binary (6 bytes) to "XX:XX:XX:XX:XX:XX"
+							result[i] = net.HardwareAddr([]byte(elem)).String()
+						} else {
+							result[i] = elem
+						}
+					}
+					return result, nil
+				}
+			}
 			return v.Elements, nil
 		}
 	case []string: