feat(agent-runner): add artifact store pull APIs

src/langbot/pkg/persistence/alembic/env.py

@@ -17,6 +17,7 @@ from langbot.pkg.entity.persistence.base import Base
 # This is required for autogenerate to detect model changes
 from langbot.pkg.entity.persistence import (
     apikey,
+    artifact,
     bot,
     bstorage,
     event_log,

src/langbot/pkg/persistence/alembic/versions/a1b2c3d4e5f6_add_agent_artifact_table.py

@@ -0,0 +1,55 @@
+"""add_agent_artifact_table
+
+Revision ID: a1b2c3d4e5f6
+Revises: 58846a8d7a81
+Create Date: 2026-05-23 20:00:00.000000
+"""
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers
+revision = 'a1b2c3d4e5f6'
+down_revision = '58846a8d7a81'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # Create agent_artifact table
+    op.create_table(
+        'agent_artifact',
+        sa.Column('id', sa.Integer(), primary_key=True, autoincrement=True),
+        sa.Column('artifact_id', sa.String(255), nullable=False, unique=True),
+        sa.Column('artifact_type', sa.String(50), nullable=False),
+        sa.Column('mime_type', sa.String(255), nullable=True),
+        sa.Column('name', sa.String(255), nullable=True),
+        sa.Column('size_bytes', sa.BigInteger(), nullable=True),
+        sa.Column('sha256', sa.String(64), nullable=True),
+        sa.Column('source', sa.String(50), nullable=False),
+        sa.Column('storage_key', sa.String(255), nullable=True),
+        sa.Column('storage_type', sa.String(50), nullable=False, server_default='binary_storage'),
+        sa.Column('conversation_id', sa.String(255), nullable=True),
+        sa.Column('run_id', sa.String(255), nullable=True),
+        sa.Column('runner_id', sa.String(255), nullable=True),
+        sa.Column('bot_id', sa.String(255), nullable=True),
+        sa.Column('workspace_id', sa.String(255), nullable=True),
+        sa.Column('created_at', sa.DateTime(), nullable=False, server_default=sa.text('(CURRENT_TIMESTAMP)')),
+        sa.Column('expires_at', sa.DateTime(), nullable=True),
+        sa.Column('metadata_json', sa.Text(), nullable=True),
+    )
+
+    # Create indexes for agent_artifact
+    with op.batch_alter_table('agent_artifact', schema=None) as batch_op:
+        batch_op.create_index('ix_agent_artifact_artifact_id', ['artifact_id'], unique=True)
+        batch_op.create_index('ix_agent_artifact_conversation_id', ['conversation_id'], unique=False)
+        batch_op.create_index('ix_agent_artifact_run_id', ['run_id'], unique=False)
+
+
+def downgrade() -> None:
+    # Drop agent_artifact table
+    with op.batch_alter_table('agent_artifact', schema=None) as batch_op:
+        batch_op.drop_index('ix_agent_artifact_run_id')
+        batch_op.drop_index('ix_agent_artifact_conversation_id')
+        batch_op.drop_index('ix_agent_artifact_artifact_id')
+
+    op.drop_table('agent_artifact')