fix(backend): fix broken update_agent_version_in_library and reduce the method code duplication (#11514)

## Summary
Fix broken `update_agent_version_in_library` functionality by eagerly
loading `AgentGraph` while loading the library, also consolidating
duplicate code that updates agent version in library and configures HITL
safe mode settings.

## Problem
The `update_agent_version_in_library` is currently failed with this
error:
```
  File "/Users/abhi/Documents/AutoGPT/autogpt_platform/backend/backend/server/v2/library/model.py", line 110, in from_db
    raise ValueError("Associated Agent record is required.")
ValueError: Associated Agent record is required.
```

also logic was duplicated across two router endpoints with identical
implementations, creating maintenance burden and potential for
inconsistencies.

## Changes Made

### Created Helper Method
- Add `_update_library_agent_version_and_settings()` helper function  
- Fixes broken `update_agent_version_in_library` by centralizing the
logic
- Uses proper error handling and settings merging with `model_copy()`

### Replaced Duplicate Code  
- **In `update_graph` function** (v1.py:863) - replaced 13 lines with
single helper call
- **In `set_graph_active_version` function** (v1.py:920) - replaced 13
lines with single helper call

### Benefits
- **Fixes broken functionality**: Centralizes
`update_agent_version_in_library` logic
- **DRY Principle**: Eliminates code duplication across two router
endpoints
- **Maintainability**: Single place to modify the library agent update
logic
- **Consistency**: Ensures both endpoints use identical logic for HITL
safe mode configuration
- **Readability**: Cleaner, more focused endpoint implementations

## Technical Details
The helper method fixes broken `update_agent_version_in_library` by
handling:
1. Updating agent version in library via
`update_agent_version_in_library()`
2. Conditionally setting `human_in_the_loop_safe_mode: true` if graph
has HITL blocks and setting is not already configured
3. Proper settings merging to preserve existing configuration

## Testing
- [x] Code compiles and passes type checking
- [x] Pre-commit hooks pass (linting, formatting, type checking)
- [x] Both affected endpoints maintain same functionality with cleaner
implementation

Fixes broken duplicate code identified in v1.py router endpoints for
`update_agent_version_in_library`.

Co-authored-by: Claude <noreply@anthropic.com>

autogpt_platform/backend/backend/server/routers/v1.py

@@ -143,6 +143,28 @@ async def hide_activity_summary_if_disabled(
     return execution
 
 
+async def _update_library_agent_version_and_settings(
+    user_id: str, agent_graph: graph_db.GraphModel
+) -> library_db.library_model.LibraryAgent:
+    # Keep the library agent up to date with the new active version
+    library = await library_db.update_agent_version_in_library(
+        user_id, agent_graph.id, agent_graph.version
+    )
+    # If the graph has HITL node, initialize the setting if it's not already set.
+    if (
+        agent_graph.has_human_in_the_loop
+        and library.settings.human_in_the_loop_safe_mode is None
+    ):
+        await library_db.update_library_agent_settings(
+            user_id=user_id,
+            agent_id=library.id,
+            settings=library.settings.model_copy(
+                update={"human_in_the_loop_safe_mode": True}
+            ),
+        )
+    return library
+
+
 # Define the API routes
 v1_router = APIRouter()
 
@@ -838,18 +860,7 @@ async def update_graph(
 
     if new_graph_version.is_active:
         # Keep the library agent up to date with the new active version
-        library = await library_db.update_agent_version_in_library(
-            user_id, graph.id, graph.version
-        )
-        if (
-            new_graph_version.has_human_in_the_loop
-            and library.settings.human_in_the_loop_safe_mode is None
-        ):
-            await library_db.update_library_agent_settings(
-                user_id=user_id,
-                agent_id=library.id,
-                settings=GraphSettings(human_in_the_loop_safe_mode=True),
-            )
+        await _update_library_agent_version_and_settings(user_id, new_graph_version)
 
         # Handle activation of the new graph first to ensure continuity
         new_graph_version = await on_graph_activate(new_graph_version, user_id=user_id)
@@ -906,18 +917,7 @@ async def set_graph_active_version(
     )
 
     # Keep the library agent up to date with the new active version
-    library = await library_db.update_agent_version_in_library(
-        user_id, new_active_graph.id, new_active_graph.version
-    )
-    if (
-        new_active_graph.has_human_in_the_loop
-        and library.settings.human_in_the_loop_safe_mode is None
-    ):
-        await library_db.update_library_agent_settings(
-            user_id=user_id,
-            agent_id=library.id,
-            settings=GraphSettings(human_in_the_loop_safe_mode=True),
-        )
+    await _update_library_agent_version_and_settings(user_id, new_active_graph)
 
     if current_active_graph and current_active_graph.version != new_active_version:
         # Handle deactivation of the previously active version

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

@@ -523,6 +523,7 @@ async def update_agent_version_in_library(
                     },
                 },
             },
+            include={"AgentGraph": True},
         )
         if lib is None:
             raise NotFoundError(f"Library agent {library_agent.id} not found")