bingo: planned status and capacity type

"MW" on the card mixed IT load, connected power, total site power,
design capacity and even MVA (Oxygen, Sber Yuzhny Port). Record which
one a figure is in a new mw_type column; the dialog tags the number
("64 MW · design") and MVA replaces the unit, while cells keep the bare
figure to stay readable. Add a "planned" status for projects not yet
under construction; like "building", it is left out of the operational
view.

Assisted-by: Claude:opus-5

db/migrations/006_bingo_mw_type.rb

@@ -0,0 +1,7 @@
+Sequel.migration do
+  change do
+    # What the mw figure measures: it | connected | total | design | mva.
+    # NULL = not stated by the source.
+    add_column :bingo_datacenters, :mw_type, String
+  end
+end