fix(graphiti): migrate graphiti_memory imports to canonical paths (#1714)

* fix(graphiti): migrate graphiti_memory imports to canonical paths

The `graphiti_memory.py` shim was removed during the backend refactor
(commit 11fcdf42) but consumers were never updated. This caused all
`from graphiti_memory import ...` to fail silently (caught by
try/except ImportError), preventing the Graphiti memory system from
initializing for any project.

Migrate the 3 remaining import sites to use the canonical module path
`integrations.graphiti.memory` instead of the deleted shim.

Closes #1220

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* style: combine docstring import example into single line

Address Gemini Code Assist review suggestion to merge two import
examples from the same module into one line.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: Andy <119136210+AndyMik90@users.noreply.github.com>

apps/backend/integrations/graphiti/memory.py

@@ -12,12 +12,8 @@ The refactored code is now organized as:
 - graphiti/search.py - Semantic search logic
 - graphiti/schema.py - Graph schema definitions
 
-This facade ensures existing imports continue to work:
-    from graphiti_memory import GraphitiMemory, is_graphiti_enabled
-
-New code should prefer importing from the graphiti package:
-    from graphiti import GraphitiMemory
-    from graphiti.schema import GroupIdMode
+Import from this module:
+    from integrations.graphiti.memory import GraphitiMemory, is_graphiti_enabled, GroupIdMode
 
 For detailed documentation on the memory system architecture and usage,
 see graphiti/graphiti.py.

apps/backend/integrations/graphiti/providers_pkg/utils.py

@@ -62,7 +62,7 @@ async def get_graph_hints(
     try:
         from pathlib import Path
 
-        from graphiti_memory import GraphitiMemory, GroupIdMode
+        from integrations.graphiti.memory import GraphitiMemory, GroupIdMode
 
         # Determine project directory from project_id or use current dir
         project_dir = Path.cwd()

apps/backend/memory/graphiti_helpers.py

@@ -17,7 +17,7 @@ from core.sentry import capture_exception
 logger = logging.getLogger(__name__)
 
 if TYPE_CHECKING:
-    from graphiti_memory import GraphitiMemory
+    from integrations.graphiti.memory import GraphitiMemory
 
 
 def is_graphiti_memory_enabled() -> bool:
@@ -60,7 +60,7 @@ async def get_graphiti_memory(
         return None
 
     try:
-        from graphiti_memory import GraphitiMemory, GroupIdMode
+        from integrations.graphiti.memory import GraphitiMemory, GroupIdMode
 
         if project_dir is None:
             project_dir = spec_dir.parent.parent