feat: add feedback database model and migration

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/alembic/versions/e65b9f8fd458_add_feedback_table.py

@@ -0,0 +1,42 @@
+"""add feedback table
+
+Revision ID: e65b9f8fd458
+Revises: 0fd2a90a9c2c
+Create Date: 2026-02-18 17:39:16.939185
+
+"""
+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 = 'e65b9f8fd458'
+down_revision: Union[str, None] = '0fd2a90a9c2c'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        'feedback',
+        sa.Column('id', postgresql.UUID(as_uuid=True), primary_key=True),
+        sa.Column('account_id', postgresql.UUID(as_uuid=True), sa.ForeignKey('accounts.id', ondelete='SET NULL'), nullable=True),
+        sa.Column('user_id', postgresql.UUID(as_uuid=True), sa.ForeignKey('users.id', ondelete='SET NULL'), nullable=False),
+        sa.Column('email', sa.String(255), nullable=False),
+        sa.Column('feedback_type', sa.String(50), nullable=False),
+        sa.Column('message', sa.Text(), nullable=False),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.func.now()),
+    )
+    op.create_index('ix_feedback_account_id', 'feedback', ['account_id'])
+    op.create_index('ix_feedback_user_id', 'feedback', ['user_id'])
+    op.create_index('ix_feedback_created_at', 'feedback', ['created_at'])
+
+
+def downgrade() -> None:
+    op.drop_index('ix_feedback_created_at', table_name='feedback')
+    op.drop_index('ix_feedback_user_id', table_name='feedback')
+    op.drop_index('ix_feedback_account_id', table_name='feedback')
+    op.drop_table('feedback')