fix: update migration to account for missing pgsodium

Author: soedirgo

migrations/db/migrations/20250218031949_pgsodium_mask_role.sql

@@ -1,25 +1,31 @@
 -- migrate:up
-CREATE OR REPLACE FUNCTION pgsodium.mask_role(masked_role regrole, source_name text, view_name text)
-RETURNS void
-LANGUAGE plpgsql
-SECURITY DEFINER
-SET search_path TO ''
-AS $function$
+
+DO $$
 BEGIN
-  EXECUTE format(
-    'GRANT SELECT ON pgsodium.key TO %s',
-    masked_role);
+  IF EXISTS (SELECT FROM pg_extension WHERE extname = 'pgsodium') THEN
+    CREATE OR REPLACE FUNCTION pgsodium.mask_role(masked_role regrole, source_name text, view_name text)
+    RETURNS void
+    LANGUAGE plpgsql
+    SECURITY DEFINER
+    SET search_path TO ''
+    AS $function$
+    BEGIN
+      EXECUTE format(
+        'GRANT SELECT ON pgsodium.key TO %s',
+        masked_role);
 
-  EXECUTE format(
-    'GRANT pgsodium_keyiduser, pgsodium_keyholder TO %s',
-    masked_role);
+      EXECUTE format(
+        'GRANT pgsodium_keyiduser, pgsodium_keyholder TO %s',
+        masked_role);
 
-  EXECUTE format(
-    'GRANT ALL ON %I TO %s',
-    view_name,
-    masked_role);
-  RETURN;
-END
-$function$;
+      EXECUTE format(
+        'GRANT ALL ON %I TO %s',
+        view_name,
+        masked_role);
+      RETURN;
+    END
+    $function$;
+  END IF;
+END $$;
 
 -- migrate:down