feat(metadata-java): accept @dbColumnType uuid_array / text_array (loader side)

The JVM loader's closed dbColumnType value set rejected the array values the
migrate-ts side now emits. Add uuid_array/text_array to VALID_DB_COLUMN_TYPES
and the legal (subtype × value) pairing (both legal on field.string), so JVM
consumers can load metadata using native-array columns.

codegen-kotlin emission (List<T> property + Exposed array<T> column) follows.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018mjBXyYKk6tbQymzhgMmdB

Author: dmealing

server/java/metadata/src/main/java/com/metaobjects/database/CoreDBMetaDataProvider.java

@@ -67,10 +67,15 @@ public class CoreDBMetaDataProvider implements MetaDataTypeProvider {
     public static final String DB_COLUMN_TYPE_JSONB = "jsonb";
     /** {@code @dbColumnType} value → {@code timestamp with time zone} column (on {@code field.timestamp}). */
     public static final String DB_COLUMN_TYPE_TIMESTAMP_TZ = "timestamp_with_tz";
+    /** {@code @dbColumnType} value → native Postgres {@code uuid[]} array column (on {@code field.string}). */
+    public static final String DB_COLUMN_TYPE_UUID_ARRAY = "uuid_array";
+    /** {@code @dbColumnType} value → native Postgres {@code text[]} array column (on {@code field.string}). */
+    public static final String DB_COLUMN_TYPE_TEXT_ARRAY = "text_array";
 
     /** The closed set of legal {@code @dbColumnType} values. */
     public static final java.util.List<String> VALID_DB_COLUMN_TYPES = java.util.List.of(
-        DB_COLUMN_TYPE_UUID, DB_COLUMN_TYPE_JSONB, DB_COLUMN_TYPE_TIMESTAMP_TZ);
+        DB_COLUMN_TYPE_UUID, DB_COLUMN_TYPE_JSONB, DB_COLUMN_TYPE_TIMESTAMP_TZ,
+        DB_COLUMN_TYPE_UUID_ARRAY, DB_COLUMN_TYPE_TEXT_ARRAY);
 
     @Override
     public String getProviderId() {

server/java/metadata/src/main/java/com/metaobjects/loader/ValidationPhase.java

@@ -710,7 +710,9 @@ private static void validateDbColumnTypeNode(MetaData node) {
         String subType = node.getSubType();
         String requiredSubType = switch (value) {
             case CoreDBMetaDataProvider.DB_COLUMN_TYPE_UUID,
-                 CoreDBMetaDataProvider.DB_COLUMN_TYPE_JSONB -> StringField.SUBTYPE_STRING;
+                 CoreDBMetaDataProvider.DB_COLUMN_TYPE_JSONB,
+                 CoreDBMetaDataProvider.DB_COLUMN_TYPE_UUID_ARRAY,
+                 CoreDBMetaDataProvider.DB_COLUMN_TYPE_TEXT_ARRAY -> StringField.SUBTYPE_STRING;
             case CoreDBMetaDataProvider.DB_COLUMN_TYPE_TIMESTAMP_TZ -> TimestampField.SUBTYPE_TIMESTAMP;
             default -> null; // unreachable — Rule 1 already rejected unknown values
         };
@@ -721,7 +723,8 @@ private static void validateDbColumnTypeNode(MetaData node) {
                     + "' @" + CoreDBMetaDataProvider.DB_COLUMN_TYPE + " '" + value
                     + "' is not valid on field." + subType
                     + " (requires field." + requiredSubType + "); allowed pairings: "
-                    + "uuid→field.string, jsonb→field.string, timestamp_with_tz→field.timestamp",
+                    + "uuid→field.string, jsonb→field.string, uuid_array→field.string, "
+                    + "text_array→field.string, timestamp_with_tz→field.timestamp",
                 ErrorCode.ERR_BAD_ATTR_VALUE, node.getSource());
         }
     }