fix: improve maintenance and synchronize live conversations

backend/alembic/env.py

@@ -16,13 +16,11 @@ limitations under the License.
 
 # alembic/env.py
 
-import os
 from logging.config import fileConfig
 from sqlalchemy import engine_from_config
 from sqlalchemy import pool
 from alembic import context
-from app.database import Base
-from app.models import Organization, User, Role, AIConfig, Agent, Knowledge, KnowledgeToAgent, AIModelType
+from app import models
 from app.core.config import settings
 
 # this is the Alembic Config object, which provides access to the values within the .ini file
@@ -38,7 +36,7 @@ if config.config_file_name is not None:
 
 # add your model's MetaData object here
 # for 'autogenerate' support
-target_metadata = Base.metadata
+target_metadata = models.Base.metadata
 
 
 def run_migrations_offline():

backend/alembic/versions/0cf34ff05aee_merge_guardrails_and_chat_initiation.py

@@ -23,8 +23,6 @@ Create Date: 2025-10-31 19:08:54.718682
 """
 from typing import Sequence, Union
 
-from alembic import op
-import sqlalchemy as sa
 
 
 # revision identifiers, used by Alembic.

backend/alembic/versions/2037204bbebf_add_guardrails_node_type.py

@@ -21,7 +21,7 @@ Revises: 7af9828611e7
 Create Date: 2025-10-29 11:47:00.000000
 
 """
-from typing import Sequence, Union
+from typing import Union
 
 from alembic import op
 # revision identifiers, used by Alembic.

backend/alembic/versions/2381319791e8_merge_multiple_heads.py

@@ -23,8 +23,6 @@ Create Date: 2026-01-08 10:31:54.013991
 """
 from typing import Sequence, Union
 
-from alembic import op
-import sqlalchemy as sa
 
 
 # revision identifiers, used by Alembic.

backend/alembic/versions/520df92643e3_added_replypier_ai_model.py

@@ -23,8 +23,6 @@ Create Date: 2025-03-28 23:27:11.906265
 """
 from typing import Sequence, Union
 from alembic import op
-import sqlalchemy as sa
-from sqlalchemy.dialects import postgresql
 
 # revision identifiers, used by Alembic.
 revision: str = '520df92643e3'

backend/alembic/versions/5b5f936cd9e4_role_remove_name_alone_as_unique.py

@@ -24,7 +24,6 @@ Create Date: 2025-02-08 07:36:33.283138
 from typing import Sequence, Union
 
 from alembic import op
-import sqlalchemy as sa
 
 
 # revision identifiers, used by Alembic.

backend/alembic/versions/85364d188f15_merge_heads.py

@@ -23,8 +23,6 @@ Create Date: 2025-03-22 20:43:28.206404
 """
 from typing import Sequence, Union
 
-from alembic import op
-import sqlalchemy as sa
 
 
 # revision identifiers, used by Alembic.

backend/alembic/versions/89a4f4898aa4_change_datetime_to_timestamp_with_.py

@@ -25,7 +25,6 @@ from typing import Sequence, Union
 
 from alembic import op
 import sqlalchemy as sa
-from sqlalchemy.dialects import postgresql
 
 # revision identifiers, used by Alembic.
 revision: str = '89a4f4898aa4'

backend/alembic/versions/9ce623009955_added_new_node_type_user_input.py 14-13-41-620.py

@@ -24,7 +24,6 @@ Create Date: 2025-07-25 13:59:26.571283
 from typing import Sequence, Union
 
 from alembic import op
-import sqlalchemy as sa
 
 
 # revision identifiers, used by Alembic.

backend/alembic/versions/a1dbf557bbb0_merge_ai_ticketing_agent_queue_heads.py

@@ -7,8 +7,6 @@ Create Date: 2026-07-20 11:02:56.904328
 """
 from typing import Sequence, Union
 
-from alembic import op
-import sqlalchemy as sa
 
 
 # revision identifiers, used by Alembic.

backend/alembic/versions/a8efc6b31aa8_merge_crm_and_chat_session_idx_heads.py

@@ -23,8 +23,6 @@ Create Date: 2026-07-28 18:55:32.388594
 """
 from typing import Sequence, Union
 
-from alembic import op
-import sqlalchemy as sa
 
 
 # revision identifiers, used by Alembic.

backend/alembic/versions/add_allowed_attachment_types_001.py

@@ -25,7 +25,6 @@ from typing import Sequence, Union
 
 from alembic import op
 import sqlalchemy as sa
-from sqlalchemy.dialects import postgresql
 
 # revision identifiers, used by Alembic.
 revision: str = 'add_allowed_attachment_types_001'

backend/alembic/versions/drop_slack_tables_001.py

@@ -30,7 +30,6 @@ recreates empty tables via the original add_slack_integration_001 shapes.
 from typing import Sequence, Union
 
 from alembic import op
-import sqlalchemy as sa
 
 
 # revision identifiers, used by Alembic.