feat: add chat based testing for voice agent (#308)

* feat: add backend foundations

* feat: add text chat UI

* chore: simplify the reload behaviour

* fix: fix upgrade banner to be triggered after package upload

* feat: simplify TesterPanel design

* chore: fix formatting and generate client

* chore: fix tracing for text chat mode

* fix: fix revert and edit CTA

* refactor: refactor TesterPanel into smaller components

* feat: enable runtime transition of nodes

* fix: fix review comments

api/alembic/versions/19d2a4b6c8ef_rename_integrations_organisation_id.py

@@ -2,6 +2,7 @@
 
 Revision ID: 19d2a4b6c8ef
 Revises: 0a1b2c3d4e5f
+
 Create Date: 2026-05-19 00:00:00.000000
 
 """

api/alembic/versions/2f638891cbb6_add_workflow_run_text_sessions.py

@@ -0,0 +1,64 @@
+"""add workflow_run_text_sessions
+
+Revision ID: 2f638891cbb6
+Revises: 19d2a4b6c8ef
+Create Date: 2026-05-18 12:58:58.573381
+
+"""
+
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = "2f638891cbb6"
+down_revision: Union[str, None] = "19d2a4b6c8ef"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table(
+        "workflow_run_text_sessions",
+        sa.Column("workflow_run_id", sa.Integer(), nullable=False),
+        sa.Column(
+            "revision", sa.Integer(), server_default=sa.text("0"), nullable=False
+        ),
+        sa.Column(
+            "session_data",
+            sa.JSON(),
+            server_default=sa.text("'{}'::json"),
+            nullable=False,
+        ),
+        sa.Column(
+            "checkpoint",
+            sa.JSON(),
+            server_default=sa.text("'{}'::json"),
+            nullable=False,
+        ),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=True),
+        sa.ForeignKeyConstraint(
+            ["workflow_run_id"], ["workflow_runs.id"], ondelete="CASCADE"
+        ),
+        sa.PrimaryKeyConstraint("workflow_run_id"),
+    )
+    op.create_index(
+        "ix_workflow_run_text_sessions_updated_at",
+        "workflow_run_text_sessions",
+        ["updated_at"],
+        unique=False,
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(
+        "ix_workflow_run_text_sessions_updated_at",
+        table_name="workflow_run_text_sessions",
+    )
+    op.drop_table("workflow_run_text_sessions")
+    # ### end Alembic commands ###