chore: establish local platform baseline

migrations/000015_media_local_delete_receipt.up.sql

@@ -0,0 +1,13 @@
+BEGIN;
+
+ALTER TABLE media_segment
+    ADD COLUMN local_delete_status varchar(16)
+        CHECK (local_delete_status IN ('DELETED', 'FAILED')),
+    ADD COLUMN local_delete_reported_at timestamptz,
+    ADD COLUMN local_delete_error_code varchar(80);
+
+CREATE INDEX media_segment_local_delete_pending_idx
+    ON media_segment (device_id, local_delete_after)
+    WHERE status = 'VERIFIED' AND local_delete_status IS NULL;
+
+COMMIT;