fixed migrations

migrations/versions/e7e4ff171f7a_add_message_attachments_table_and_.py

@@ -7,6 +7,7 @@ Create Date: 2025-05-26 15:00:18.557702
 """
 from alembic import op
 import sqlalchemy as sa
+from sqlalchemy import inspect
 
 
 # revision identifiers, used by Alembic.
@@ -18,7 +19,12 @@ depends_on = None
 
 def upgrade():
     # ### commands auto generated by Alembic - please adjust! ###
-    op.create_table('message_attachment',
+        conn = op.get_bind()
+    inspector = inspect(conn)
+    tables = inspector.get_table_names()
+    
+    if 'message_attachment' not in tables:
+        op.create_table('message_attachment',
     sa.Column('id', sa.Integer(), nullable=False),
     sa.Column('message_id', sa.Integer(), nullable=False),
     sa.Column('name', sa.String(length=255), nullable=False),