fix(BA-5650-D): align remaining slice D call sites with owner_id rename

After rebasing on slice C, three residual references in
``session/db_source/db_source.py`` still used the old ``access_key``
variable name. This commit finishes the rename in:

- ``get_session_validated`` / ``match_sessions`` / ``update_session_name``
  (now forward ``owner_id=...`` instead of the leftover
  ``owner_access_key`` keyword).
- ``_find_dependent_sessions`` and ``get_target_session_ids`` (now pass
  the local ``owner_id`` UUID instead of the non-existent ``access_key``).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jopemachine

src/ai/backend/manager/repositories/session/db_source/db_source.py

@@ -73,7 +73,7 @@ async def get_session_validated(
             return await SessionRow.get_session(
                 db_sess,
                 session_name_or_id,
-                owner_access_key=owner_access_key,
+                owner_id=owner_id,
                 kernel_loading_strategy=kernel_loading_strategy,
                 allow_stale=allow_stale,
                 eager_loading_op=list(eager_loading_op) if eager_loading_op else None,
@@ -88,7 +88,7 @@ async def match_sessions(
             return await SessionRow.match_sessions(
                 db_sess,
                 id_or_name_prefix,
-                owner_access_key=owner_access_key,
+                owner_id=owner_id,
             )
 
     async def get_session_to_determine_status(
@@ -140,7 +140,7 @@ async def _update(db_session: AsyncSession) -> SessionRow:
                 await SessionRow.get_session(
                     db_session,
                     new_name,
-                    owner_access_key=owner_access_key,
+                    owner_id=owner_id,
                     kernel_loading_strategy=KernelLoadingStrategy.NONE,
                 )
                 raise SessionAlreadyExists(f"Session with name '{new_name}' already exists")
@@ -151,7 +151,7 @@ async def _update(db_session: AsyncSession) -> SessionRow:
             session_row = await SessionRow.get_session(
                 db_session,
                 session_name_or_id,
-                owner_access_key=owner_access_key,
+                owner_id=owner_id,
                 kernel_loading_strategy=KernelLoadingStrategy.ALL_KERNELS,
             )
 
@@ -310,7 +310,7 @@ async def modify_session(
                     sess = await SessionRow.get_session(
                         db_session,
                         session_name,
-                        owner_access_key=AccessKey(session_row.access_key),
+                        owner_id=session_row.user_uuid,
                     )
                 except SessionNotFound:
                     pass
@@ -400,7 +400,7 @@ async def _find_recursive_dependencies(session_id: uuid.UUID) -> set[uuid.UUID]:
         root_session = await SessionRow.get_session(
             db_sess,
             root_session_name_or_id,
-            owner_access_key=access_key,
+            owner_id=owner_id,
             allow_stale=allow_stale,
         )
         root_session_id = cast(uuid.UUID, root_session.id)
@@ -440,7 +440,7 @@ async def get_target_session_ids(
                     session = await SessionRow.get_session(
                         db_sess,
                         session_name_or_id,
-                        owner_access_key=access_key,
+                        owner_id=owner_id,
                         kernel_loading_strategy=KernelLoadingStrategy.NONE,
                         allow_stale=True,
                     )
@@ -474,7 +474,7 @@ async def get_session_with_group(
             return await SessionRow.get_session(
                 db_sess,
                 session_name_or_id,
-                owner_access_key=owner_access_key,
+                owner_id=owner_id,
                 kernel_loading_strategy=kernel_loading_strategy,
                 allow_stale=allow_stale,
                 eager_loading_op=[selectinload(SessionRow.group)],
@@ -490,7 +490,7 @@ async def get_session_with_routing_minimal(
             return await SessionRow.get_session(
                 db_sess,
                 session_name_or_id,
-                owner_access_key=owner_access_key,
+                owner_id=owner_id,
                 kernel_loading_strategy=KernelLoadingStrategy.MAIN_KERNEL_ONLY,
                 eager_loading_op=[
                     selectinload(SessionRow.routing).options(noload("*")),