feat(viz): interactive algorithm viz system

backend/alembic/versions/005_add_visualization_examples.py

@@ -0,0 +1,33 @@
+"""add visualization examples to patterns
+
+Revision ID: 005
+Revises: 004
+Create Date: 2025-05-10
+
+"""
+
+from collections.abc import Sequence
+
+import sqlalchemy as sa
+from alembic import op
+from sqlalchemy.dialects import postgresql
+
+revision: str = "005"
+down_revision: str | None = "004"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "patterns",
+        sa.Column(
+            "visualization_examples",
+            postgresql.JSONB(astext_type=sa.Text()),
+            nullable=True,
+        ),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("patterns", "visualization_examples")