test(codegen-kotlin): add 4 snapshot fixtures (FK / payload origins / enum / @storage)

Locks down regression-test coverage for the features shipped in Phases A-G
that previously had only unit-test coverage. Each fixture exercises one
feature class end-to-end through the generators registered in config.json.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: dmealing

server/java/codegen-kotlin/src/test/resources/fixtures/entity-with-enum/config.json

@@ -0,0 +1 @@
+{ "generators": ["entity", "table"] }

server/java/codegen-kotlin/src/test/resources/fixtures/entity-with-enum/meta.json

@@ -0,0 +1,14 @@
+{
+  "metadata.root": {
+    "package": "acme::game",
+    "children": [
+      { "object.entity": { "name": "Player", "children": [
+          { "field.long":   { "name": "id" } },
+          { "field.string": { "name": "username", "@maxLength": 50 } },
+          { "field.enum":   { "name": "status", "@values": ["ACTIVE", "INACTIVE", "BANNED"] } },
+          { "source.rdb":   { "@table": "players" } },
+          { "identity.primary": { "@fields": "id", "@generation": "increment" } }
+      ] } }
+    ]
+  }
+}

server/java/codegen-kotlin/src/test/resources/fixtures/entity-with-fk/config.json

@@ -0,0 +1 @@
+{ "generators": ["entity", "table"] }

server/java/codegen-kotlin/src/test/resources/fixtures/entity-with-fk/meta.json

@@ -0,0 +1,22 @@
+{
+  "metadata.root": {
+    "package": "acme::blog",
+    "children": [
+      { "object.entity": { "name": "Author", "children": [
+          { "field.long":   { "name": "id" } },
+          { "field.string": { "name": "name", "@maxLength": 100 } },
+          { "source.rdb":   { "@table": "authors" } },
+          { "identity.primary": { "@fields": "id", "@generation": "increment" } }
+      ] } },
+      { "object.entity": { "name": "Post", "children": [
+          { "field.long":   { "name": "id" } },
+          { "field.string": { "name": "title", "@maxLength": 255 } },
+          { "relationship.composition": { "name": "author",
+              "@objectRef": "Author",
+              "@onDelete": "cascade" } },
+          { "source.rdb":   { "@table": "posts" } },
+          { "identity.primary": { "@fields": "id", "@generation": "increment" } }
+      ] } }
+    ]
+  }
+}

server/java/codegen-kotlin/src/test/resources/fixtures/entity-with-storage/config.json

@@ -0,0 +1 @@
+{ "generators": ["entity", "table"] }

server/java/codegen-kotlin/src/test/resources/fixtures/entity-with-storage/meta.json

@@ -0,0 +1,28 @@
+{
+  "metadata.root": {
+    "package": "acme::commerce",
+    "children": [
+      { "object.value": { "name": "Address", "children": [
+          { "field.string": { "name": "street", "@maxLength": 200 } },
+          { "field.string": { "name": "city", "@maxLength": 100 } },
+          { "field.string": { "name": "zip", "@maxLength": 20 } }
+      ] } },
+      { "object.value": { "name": "UserMetadata", "children": [
+          { "field.string": { "name": "locale" } },
+          { "field.string": { "name": "timezone" } }
+      ] } },
+      { "object.entity": { "name": "User", "children": [
+          { "field.long":   { "name": "id" } },
+          { "field.string": { "name": "email", "@maxLength": 255 } },
+          { "field.object": { "name": "address",
+              "@objectRef": "Address",
+              "@storage": "flattened" } },
+          { "field.object": { "name": "preferences",
+              "@objectRef": "UserMetadata",
+              "@storage": "jsonb" } },
+          { "source.rdb":   { "@table": "users" } },
+          { "identity.primary": { "@fields": "id", "@generation": "increment" } }
+      ] } }
+    ]
+  }
+}

server/java/codegen-kotlin/src/test/resources/fixtures/payload-with-origins/config.json

@@ -0,0 +1 @@
+{ "generators": ["payload"] }

server/java/codegen-kotlin/src/test/resources/fixtures/payload-with-origins/meta.json

@@ -0,0 +1,29 @@
+{
+  "metadata.root": {
+    "package": "acme::ai",
+    "children": [
+      { "object.entity": { "name": "Author", "children": [
+          { "field.long":   { "name": "id" } },
+          { "field.string": { "name": "name" } },
+          { "field.string": { "name": "bio" } },
+          { "relationship.association": { "name": "posts", "@objectRef": "Post" } }
+      ] } },
+      { "object.entity": { "name": "Post", "children": [
+          { "field.long":   { "name": "id" } },
+          { "field.string": { "name": "title" } },
+          { "relationship.composition": { "name": "author", "@objectRef": "Author" } }
+      ] } },
+      { "object.value": { "name": "AuthorReport", "children": [
+          { "field.string": { "name": "name", "children": [
+              { "origin.passthrough": { "@from": "Author.name" } }
+          ] } },
+          { "field.long":   { "name": "postCount", "children": [
+              { "origin.aggregate": { "@agg": "count", "@of": "Post.id", "@via": "Author.posts" } }
+          ] } }
+      ] } },
+      { "template.prompt": { "name": "AuthorBio",
+          "@payloadRef": "AuthorReport",
+          "@textRef": "ai/bio" } }
+    ]
+  }
+}