huskies: merge 1087 story Pipeline+Status split — Step D: migrate CRDT storage to (Pipeline, Status) and remove the Stage enum

server/migrations/20260515000000_split_stage_into_pipeline_status.sql

@@ -0,0 +1,56 @@
+-- Story 1087: split the legacy `stage` column on `pipeline_items` into a
+-- `(pipeline, status)` pair so the read side no longer needs to re-derive the
+-- display column and badge from the stage string.
+--
+-- The migration is additive: `stage` is retained for backwards compatibility
+-- while remaining Step E callers are migrated.  The backup of `pipeline.db`
+-- written by `shadow_write::init` immediately before this migration runs is
+-- the recovery path if the backfill produces an unexpected projection.
+
+ALTER TABLE pipeline_items ADD COLUMN pipeline TEXT NOT NULL DEFAULT '';
+ALTER TABLE pipeline_items ADD COLUMN status   TEXT NOT NULL DEFAULT '';
+
+-- Backfill `pipeline` from the existing `stage` column.  Every wire-form
+-- stage string emitted by `stage_dir_name` maps to exactly one of the seven
+-- Pipeline columns defined in `pipeline_state::types::Pipeline::as_str`.
+-- Legacy directory strings (`1_backlog`, `2_current`, ...) are also handled
+-- so that databases predating story 934 migrate cleanly.
+UPDATE pipeline_items SET pipeline = CASE stage
+    WHEN 'upcoming'            THEN 'backlog'
+    WHEN 'backlog'             THEN 'backlog'
+    WHEN '1_backlog'           THEN 'backlog'
+    WHEN 'coding'              THEN 'coding'
+    WHEN 'blocked'             THEN 'coding'
+    WHEN '2_current'           THEN 'coding'
+    WHEN 'qa'                  THEN 'qa'
+    WHEN 'review_hold'         THEN 'qa'
+    WHEN '3_qa'                THEN 'qa'
+    WHEN 'merge'               THEN 'merge'
+    WHEN 'merge_failure'       THEN 'merge'
+    WHEN 'merge_failure_final' THEN 'merge'
+    WHEN '4_merge'             THEN 'merge'
+    WHEN 'done'                THEN 'done'
+    WHEN '5_done'              THEN 'done'
+    WHEN 'abandoned'           THEN 'closed'
+    WHEN 'superseded'          THEN 'closed'
+    WHEN 'rejected'            THEN 'closed'
+    WHEN 'archived'            THEN 'archived'
+    WHEN '6_archived'          THEN 'archived'
+    WHEN 'frozen'              THEN 'coding'
+    ELSE ''
+END;
+
+-- Backfill `status` (badge) from the existing `stage` column.
+UPDATE pipeline_items SET status = CASE stage
+    WHEN 'frozen'              THEN 'frozen'
+    WHEN 'review_hold'         THEN 'review-hold'
+    WHEN 'blocked'             THEN 'blocked'
+    WHEN 'merge_failure'       THEN 'merge-failure'
+    WHEN 'merge_failure_final' THEN 'merge-failure-final'
+    WHEN 'abandoned'           THEN 'abandoned'
+    WHEN 'superseded'          THEN 'superseded'
+    WHEN 'rejected'            THEN 'rejected'
+    WHEN 'done'                THEN 'done'
+    WHEN '5_done'              THEN 'done'
+    ELSE 'active'
+END;