fixed migrations

migrations/versions/20519a2437c2_add_mails_table.py

@@ -7,6 +7,7 @@ Create Date: 2025-06-02 09:04:39.972021
 """
 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('mails',
+        conn = op.get_bind()
+    inspector = inspect(conn)
+    tables = inspector.get_table_names()
+    
+    if 'mails' not in tables:
+        op.create_table('mails',
     sa.Column('id', sa.Integer(), nullable=False),
     sa.Column('recipient', sa.String(length=150), nullable=False),
     sa.Column('subject', sa.String(length=200), nullable=False),