fix(agent): add stable debug conversation (#37744)

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

api/migrations/versions/2026_06_22_1000-c8f4a6b2d3e1_add_agent_debug_conversation_id.py

@@ -0,0 +1,30 @@
+"""add agent debug conversation id
+
+Revision ID: c8f4a6b2d3e1
+Revises: b2515f9d4c2a
+Create Date: 2026-06-22 10:00:00.000000
+
+"""
+
+import sqlalchemy as sa
+from alembic import op
+
+import models
+
+# revision identifiers, used by Alembic.
+revision = "c8f4a6b2d3e1"
+down_revision = "b2515f9d4c2a"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    with op.batch_alter_table("agents", schema=None) as batch_op:
+        batch_op.add_column(sa.Column("debug_conversation_id", models.types.StringUUID(), nullable=True))
+        batch_op.create_index("agent_debug_conversation_id_idx", ["debug_conversation_id"], unique=False)
+
+
+def downgrade():
+    with op.batch_alter_table("agents", schema=None) as batch_op:
+        batch_op.drop_index("agent_debug_conversation_id_idx")
+        batch_op.drop_column("debug_conversation_id")