test(omdb): migrate stale value-with-source fixtures to object.entity (FR-024 B4a)

Follow-up to 719c70d: the full Java reactor (om/omdb unit tests, beyond the
metadata module the parity fork verified) had 6 fixtures declaring persisted
records (a source.rdb table + identity.primary) as object.value — a pre-FR-024
laxity that B4a value-purity now correctly rejects (ERR_SUBTYPE_RULE_VIOLATION).
Migrated each mis-declared node value→entity: Sample, Widget(uuid), Basket,
FullBasketView, Program, Item(jsonb), Widget(ktx). Prefs stays object.value (a
genuine pure value, no source). No validation pass changed — the fixtures were
wrong, not the rule.

Full reactor green: 3306 tests, exit 0, zero ERR_ codes. Static scan found no
other FR-024 fixture violations.

Note: FullBasketView is a @kind:view derived shape migrated to object.entity (the
legacy view-entity spelling, still legal until B4b lands); it becomes
object.projection in the FR-024 codegen increment (B4b).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LuZWKnWzYGVnESijL7uuky

Author: dmealing

server/java/omdb-ktx/src/test/resources/meta.widget.json

@@ -3,7 +3,7 @@
     "package": "ktx",
     "children": [
       {
-        "object.value": {
+        "object.entity": {
           "name": "Widget",
           "@object": "com.metaobjects.object.value.ValueObject",
           "children": [

server/java/omdb/src/test/resources/meta.codec.json

@@ -3,7 +3,7 @@
     "package": "codectest",
     "children": [
       {
-        "object.value": {
+        "object.entity": {
           "name": "Sample",
           "package": "codectest",
           "@object": "com.metaobjects.object.value.ValueObject",

server/java/omdb/src/test/resources/meta.expected.json

@@ -3,7 +3,7 @@
     "package": "myapp::commerce",
     "children": [
       {
-        "object.value": {
+        "object.entity": {
           "name": "Program",
           "@object": "com.metaobjects.object.value.ValueObject",
           "children": [

server/java/omdb/src/test/resources/meta.fruit.json

@@ -3,7 +3,7 @@
     "package": "produce",
     "children": [
       {
-        "object.value": {
+        "object.entity": {
           "name": "Basket",
           "package": "container",
           "@object": "com.metaobjects.object.value.ValueObject",
@@ -42,7 +42,7 @@
         }
       },
       {
-        "object.value": {
+        "object.entity": {
           "name": "FullBasketView",
           "extends": "container::Basket",
           "@object": "com.metaobjects.object.value.ValueObject",

server/java/omdb/src/test/resources/meta.jsonb.json

@@ -3,7 +3,7 @@
     "package": "jsonbtest",
     "children": [
       {
-        "object.value": {
+        "object.entity": {
           "name": "Item",
           "@object": "com.metaobjects.object.value.ValueObject",
           "children": [

server/java/omdb/src/test/resources/meta.uuid.json

@@ -3,7 +3,7 @@
     "package": "uuidtest",
     "children": [
       {
-        "object.value": {
+        "object.entity": {
           "name": "Widget",
           "package": "uuidtest",
           "@object": "com.metaobjects.object.value.ValueObject",