feat(pipeline): include 'Open, but proposed to close' schools in dims

These schools are still operating and publish results; they drop out
automatically when GIAS flips them to Closed since marts fully rebuild
each run.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

pipeline/transform/models/marts/dim_location.sql

@@ -31,4 +31,5 @@ select
         else null
     end as longitude
 from {{ ref('stg_gias_establishments') }} s
-where s.status = 'Open'
+-- Must match dim_school's status filter exactly (the API inner-joins the two).
+where s.status in ('Open', 'Open, but proposed to close')