feat(patterns): pattern taxonomy + is_optimal

backend/alembic/versions/006_pattern_taxonomy.py

@@ -0,0 +1,35 @@
+"""add pattern taxonomy fields
+
+Revision ID: 006
+Revises: 005
+Create Date: 2025-07-05
+
+"""
+
+from collections.abc import Sequence
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "006"
+down_revision: str | None = "005"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    # Add pattern_type and display_order to patterns table
+    op.add_column("patterns", sa.Column("pattern_type", sa.String(50), nullable=True))
+    op.add_column("patterns", sa.Column("display_order", sa.Integer(), nullable=True))
+
+    # Add is_optimal to question_patterns junction table
+    op.add_column(
+        "question_patterns",
+        sa.Column("is_optimal", sa.Boolean(), server_default="false", nullable=False),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("question_patterns", "is_optimal")
+    op.drop_column("patterns", "display_order")
+    op.drop_column("patterns", "pattern_type")