Remove deprecated SOA code

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

pkg/coredata/migrations/20260217T120000Z.sql

@@ -0,0 +1,6 @@
+ALTER TABLE controls ALTER COLUMN status DROP NOT NULL;
+
+-- TODO: drop columns and type once all code references are fully removed
+-- ALTER TABLE controls DROP COLUMN status;
+-- ALTER TABLE controls DROP COLUMN exclusion_justification;
+-- DROP TYPE control_status;