Align SAP author blocks on existing entries (#1779)

Metadata-only refresh per the SAP namespace policy (Florian/Klaus/Avital,
2026-05-04). No slug renames, no new entries.

- sap-mdk-server: expand author from {"name":"SAP"} to the unified
  SAP SE block with ospo@sap.com.
- ui5: add unified UI5 author block (openui5@sap.com per Florian's
  carve-out for the SAPUI5/OpenUI5 brand).
- ui5-typescript-conversion: same UI5 author block as ui5.

Split out of #1616 to keep that PR scoped to sap-hana-cli only.

.claude-plugin/marketplace.json

@@ -1699,7 +1699,9 @@
       "name": "sap-mdk-server",
       "description": "MCP server for SAP Mobile Development Kit (MDK). Build and modify MDK applications with AI assistance — schema lookups, action validation, rule editing, and project scaffolding.",
       "author": {
-        "name": "SAP"
+        "name": "SAP SE",
+        "email": "ospo@sap.com",
+        "url": "https://www.sap.com"
       },
       "category": "development",
       "source": {
@@ -2023,6 +2025,11 @@
     {
       "name": "ui5",
       "description": "SAPUI5 / OpenUI5 plugin for Claude. Create and validate UI5 projects, access API documentation, run UI5 linter, get development guidelines and best practices for UI5 development.",
+      "author": {
+        "name": "SAP SE",
+        "email": "openui5@sap.com",
+        "url": "https://www.sap.com"
+      },
       "category": "development",
       "source": {
         "source": "git-subdir",
@@ -2036,6 +2043,11 @@
     {
       "name": "ui5-typescript-conversion",
       "description": "SAPUI5 / OpenUI5 plugin for Claude. Convert JavaScript based UI5 projects to TypeScript.",
+      "author": {
+        "name": "SAP SE",
+        "email": "openui5@sap.com",
+        "url": "https://www.sap.com"
+      },
       "category": "development",
       "source": {
         "source": "git-subdir",