feat: organize tools and enable qwen realtime calls

backend/migrations/versions/20260813_0022_clean_realtime_prompt_builtins.py

@@ -0,0 +1,38 @@
+"""remove unsupported built-ins from realtime prompt assistants
+
+Revision ID: 20260813_0022
+Revises: 20260813_0021
+"""
+
+from __future__ import annotations
+
+from collections.abc import Sequence
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision: str = "20260813_0022"
+down_revision: str | Sequence[str] | None = "20260813_0021"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    """Make stored configuration match the current Realtime Prompt runtime."""
+
+    op.get_bind().execute(
+        sa.text(
+            "UPDATE assistants "
+            "SET built_in_tools = '{}'::jsonb "
+            "WHERE type = 'prompt' "
+            "AND runtime_mode = 'realtime' "
+            "AND built_in_tools <> '{}'::jsonb"
+        )
+    )
+
+
+def downgrade() -> None:
+    # The removed values cannot be reconstructed and were never executable in
+    # Realtime Prompt sessions. Keep downgrade structurally safe and explicit.
+    pass