fix(backend): Unbreak add_store_agent_to_library (#10166)

- Follow-up fix for #9786

A change to a DB statement introduced in #9786 turns out to be breaking.
Apparently `connect` can't just be used for *some* relations: if it is
used, it must be used for *all* relations created by the statement.

### Changes 🏗️

- Fix broken DB statement in `add_store_agent_to_library(..)`

### Checklist 📋

#### For code changes:
- [x] I have clearly listed my changes in the PR description
- [x] I have made a test plan
- [x] I have tested my changes according to the test plan:
  - [x] Add store agent to library

Co-authored-by: Swifty <craigswift13@gmail.com>

autogpt_platform/backend/backend/server/v2/library/db.py

@@ -466,15 +466,15 @@ async def add_store_agent_to_library(
 
             # Create LibraryAgent entry
             added_agent = await prisma.models.LibraryAgent.prisma().create(
-                data=prisma.types.LibraryAgentCreateInput(
-                    userId=user_id,
-                    AgentGraph={
+                data={
+                    "User": {"connect": {"id": user_id}},
+                    "AgentGraph": {
                         "connect": {
                             "graphVersionId": {"id": graph.id, "version": graph.version}
                         }
                     },
-                    isCreatedByUser=False,
-                ),
+                    "isCreatedByUser": False,
+                },
                 include=library_agent_include(user_id),
             )
             logger.debug(