Index workplan flavor and omit residuals from default views.

STATE-WP-0092: persist flavor from files, treat depends_on as the C-20
canonical edge, exclude flavor=residual from summary/next_steps/deps
unless include_residuals is set. Live primary still needs the alembic
revision applied.

Assistant: grok
Assistant-Session: 01a09dc1-b21e-77e1-919e-fcad2f82b267

migrations/versions/c6f7a8b9d0e1_work_record_flavor.py

@@ -0,0 +1,39 @@
+"""work-record flavor on workplans and tasks (STATE-WP-0092)
+
+Flavor is a closed bucket (planning, implementation, refactoring, extension,
+residual), orthogonal to kind and status. Nullable: unset is not residual.
+
+Revision ID: c6f7a8b9d0e1
+Revises: b5e6f7a8c9d0
+"""
+from alembic import op
+import sqlalchemy as sa
+
+revision = "c6f7a8b9d0e1"
+down_revision = "b5e6f7a8c9d0"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column("workplans", sa.Column("flavor", sa.String(length=32), nullable=True))
+    op.add_column(
+        "workplans",
+        sa.Column("flavor_promotion_reason", sa.String(length=32), nullable=True),
+    )
+    op.add_column(
+        "workplans",
+        sa.Column("flavor_promoted_from", sa.String(length=32), nullable=True),
+    )
+    op.create_index("ix_workplans_flavor", "workplans", ["flavor"])
+    op.add_column("tasks", sa.Column("flavor", sa.String(length=32), nullable=True))
+    op.create_index("ix_tasks_flavor", "tasks", ["flavor"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_tasks_flavor", table_name="tasks")
+    op.drop_column("tasks", "flavor")
+    op.drop_index("ix_workplans_flavor", table_name="workplans")
+    op.drop_column("workplans", "flavor_promoted_from")
+    op.drop_column("workplans", "flavor_promotion_reason")
+    op.drop_column("workplans", "flavor")