Feat/support multimodal embedding (#29115)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/migrations/versions/2025_11_12_1537-d57accd375ae_support_multi_modal.py

@@ -0,0 +1,57 @@
+"""support-multi-modal
+
+Revision ID: d57accd375ae
+Revises: 03f8dcbc611e
+Create Date: 2025-11-12 15:37:12.363670
+
+"""
+from alembic import op
+import models as models
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'd57accd375ae'
+down_revision = '7bb281b7a422'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('segment_attachment_bindings',
+    sa.Column('id', models.types.StringUUID(), nullable=False),
+    sa.Column('tenant_id', models.types.StringUUID(), nullable=False),
+    sa.Column('dataset_id', models.types.StringUUID(), nullable=False),
+    sa.Column('document_id', models.types.StringUUID(), nullable=False),
+    sa.Column('segment_id', models.types.StringUUID(), nullable=False),
+    sa.Column('attachment_id', models.types.StringUUID(), nullable=False),
+    sa.Column('created_at', sa.DateTime(), server_default=sa.text("CURRENT_TIMESTAMP"), nullable=False),
+    sa.PrimaryKeyConstraint('id', name='segment_attachment_binding_pkey')
+    )
+    with op.batch_alter_table('segment_attachment_bindings', schema=None) as batch_op:
+        batch_op.create_index(
+            'segment_attachment_binding_tenant_dataset_document_segment_idx',
+            ['tenant_id', 'dataset_id', 'document_id', 'segment_id'],
+            unique=False
+        )
+        batch_op.create_index('segment_attachment_binding_attachment_idx', ['attachment_id'], unique=False)
+
+    with op.batch_alter_table('datasets', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('is_multimodal', sa.Boolean(), server_default=sa.text('false'), nullable=False))
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please
+    with op.batch_alter_table('datasets', schema=None) as batch_op:
+        batch_op.drop_column('is_multimodal')
+
+
+    with op.batch_alter_table('segment_attachment_bindings', schema=None) as batch_op:
+        batch_op.drop_index('segment_attachment_binding_attachment_idx')
+        batch_op.drop_index('segment_attachment_binding_tenant_dataset_document_segment_idx')
+
+    op.drop_table('segment_attachment_bindings')
+    # ### end Alembic commands ###